The Reply-Speed Trap
There’s a small, embarrassing bias I catch myself falling for at least once a week, and I suspect you do too.
Someone replies to an email in four minutes and I decide, somewhere below conscious thought, that they’re sharp. On top of it. A good bet. Someone else takes two days, and a little voice files them under “flaky” before I’ve read a single word of what they actually wrote.
Harvard Business Review ran a piece last year making exactly this point about hiring — that response speed can quietly distort how we judge a candidate’s competence. A fast reply makes someone seem more capable than they are. Read it and you nod along, because it’s obviously true about other people.
Then you sit with it for a second, and it gets less comfortable, because it’s not just about hiring. It’s about how your buyers judge you. And it’s about how you judge your own work.
The buyer side
Think about the last vendor you almost went with because they were just so responsive. Instant replies. A proposal by end of day. The demo booked before you’d finished asking. It felt like competence. It felt like they wanted it.
Sometimes it was competence. But sometimes — and you know this if you’ve been burned — the speed was the whole product. The fast-twitch reflexes were hiding the fact that there wasn’t much behind them. The thoughtful one who took a day to send something actually considered? You’d already written them off.
We are all running this bias on the vendors, agencies, and hires we choose. Which means our buyers are running it on us. Some of them are picking the marketing partner who answers fastest over the one who thinks hardest. That’s a little bleak, and also just true, and worth knowing about the game you’re actually in.
What the research actually says (it’s more interesting than “slow down”)
Here’s the twist that makes this worth more than a productivity cliché: speed genuinely does matter — just not for the reason we reward it.
When it comes to reaching a buyer, fast is close to everything. In a classic MIT study of more than 15,000 leads, Dr. James Oldroyd found that companies contacting a new lead within five minutes were 21 times more likely to qualify it than those who waited just thirty (Oldroyd/InsideSales, 2007). The follow-up audit of 2,241 companies in Harvard Business Review found firms that responded within an hour were nearly 7 times likelier to have a meaningful conversation with a decision-maker than those who waited even a little longer — and 60 times likelier than the ones who waited a day (“The Short Life of Online Sales Leads,” Oldroyd, McElheran & Elkington, HBR, 2011). The average response time in that study was forty-two hours — a benchmark from the era before instant chat, routing rules and auto-assignment, so read the number as history and the principle as current. When a buyer raises their hand, twitch-speed still wins.
But notice what that speed is actually good for. It’s good for catching attention — being there in the five-minute window when someone’s ready. It says nothing about whether the thinking behind the reply is any good.
That’s where the second body of research comes in. Psychologists call it processing fluency: we tend to trust things that are easy and quick to process, and we transfer that ease onto the source — rating fast, fluent responders as more competent and more credible than they’ve earned (see the fluency–confidence work in Psychonomic Bulletin & Review, 2012). It’s the same bias HBR flagged in hiring: a quick reply makes a candidate seem sharper than a slower one, independent of what they said (“Don’t Let Reply Speed Distort Hiring Decisions,” HBR, 2025).
Put the two together and you get the whole trap in one line:
speed is a real advantage for getting in front of someone, and a terrible proxy for whether you should trust their judgment once you’re there.
We confuse the first thing for the second constantly.
The self side — this is the one that gets me
Here’s where it turns personal. The reply-speed trap isn’t only how we judge each other. It’s the standard we quietly hold ourselves to.
When you’re a founder or a lean marketing leader, “fast” starts to feel like the whole job. Inbox at zero. Replied before they finished asking. Turned the thing around overnight. It feels like being good at your work, because it’s visible, immediate, and rewarded — people tell you you’re responsive, and it lands like a compliment about your character.
But speed and value are different animals. The fastest email I send all week is almost never the most important thing I do. The important thing is slow: the strategy I sat with over a weekend, the campaign I killed after actually thinking about it, the hard sentence I rewrote six times until it was true. None of that pings anyone. Nobody thanks you for the two days you took to not send the reflexive answer.
So we optimize for the twitch, because the twitch gets applause, and we let the slow, valuable work happen in the cracks — or not at all.
What I try to do about it
I haven’t beaten this. I just try to catch it. Two small habits help.
One: when I notice I’m impressed by someone’s speed, I ask myself what they actually said. Strip out the velocity. Would this still look sharp if it had arrived on Thursday? Usually yes. Occasionally, tellingly, no.
Two: I try to protect a little of my week for the work that pings no one. The thinking that has no reply-speed at all, because it’s not a reply — it’s the thing worth replying about. It’s the least rewarded hour on my calendar and, most weeks, the only one that actually moves anything.
Fast is a nice quality in an email. It’s a terrible proxy for whether someone — including you — is any good at the work that matters. Worth remembering the next time you’re impressed by a four-minute reply. Especially if the four-minute reply is your own.
— If this one resonated, I’d genuinely like to hear which side of it you catch yourself on. Reply and tell me.
Sources: Dr. James Oldroyd, MIT/InsideSales lead-response study, 2007. “The Short Life of Online Sales Leads,” Oldroyd, McElheran & Elkington, Harvard Business Review, 2011. Fluency–confidence research, Psychonomic Bulletin & Review, 2012. “Don’t Let Reply Speed Distort Hiring Decisions,” Harvard Business Review, 2025.
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