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AI Summary
More products have failed than bad ideas ever have because of the gap between what people say and what they do.
You take people into a focus group and ask, “Would you pay Rs 50 more for the eco-friendly version?” Almost every hand goes up. You launch it, and the sales aren’t there. Here’s the deal. The people in that room were not lying. They told you who they wanted to be. Then they went into a shop and showed themselves as they really are.
Why Customer Behaviour Matters More Than Customer Claims
This is the say-do gap, also known as the intention-action gap, and it has quietly killed more products than bad ideas ever have. There are two totally different sets of data here. What people promise they will do, and what they actually do with their own money. 
Expressed preferences are aspirational, a little performative, and free to say out loud. The truth lies in revealed preferences, actual customer behaviour. Those choices cost something, and once you see it, you see it everywhere. Everyone claims to want healthy, sustainable, ethical choices. The average shopping basket is full of products that are tasty, cheap, and convenient.
You ask, “Would you use this feature?” and people enthusiastically say yes. Then the usage data comes back, and it is silence.
There’s a classic story marketers love to talk about. A focus group said they liked a boombox in a bright colour. Then, when they were offered a free one on the way out, everyone quietly took home the black one.
The bigger problem is that surveys ask people to predict their own future behaviour, and humans are really bad at it. We don’t know what we will want in a month. We respond with the version of ourselves we want to become, not necessarily the version that shows up in the real world.
The lesson for the young brand manager is discipline. Give much more weight to customer behaviour than to what customers say. A small test with real money, a pre-order, an A/B test, a limited release, or actual customer behaviour beats a large, confident survey every time.
When asking questions, ask about the past. “What did you buy last time, and why?” is far more valuable than “Would you buy this?” Memories of real behaviour are usually more reliable than predictions about imagined behaviour.
Also, be very suspicious when research gives you the answer you wanted. That’s almost always when you’re being told a comfortable story rather than the truth.
Hear what your customers are telling you, by all means. Just believe them for what they do. The wallet doesn’t perform for an audience. Customer behaviour always tells the real story.
