So, this is the first I've heard of Google Surveys. Here is Google's information on them: <a href="http://www.google.com/insights/consumersurveys/how" rel="nofollow">http://www.google.com/insights/consumersurveys/how</a><p>From what I was able to gather, they only ask a participant a single question in exchange to be able to access some premium content. Because it's just one question, they don't ask you demographic information. That what those "inferred age/gender" things are. Google gives a best guess as to what your demographics are based on other information they've collected about you.<p>The fact that its google's guess about demographics + only data from people actively seeking to avoid paying for premium content biases the results somewhat. I'm not entirely clear what the premium content is, but if the content consistently appeals to one type of person over another, it would definitely be a source of bias. Google's guess about your demographics probably just increases the error a little bit, but I'd be surprised if it consistently skewed the results in one direction or another.<p>So, not a perfect scientific survey, but miles above most web based surveys out there.<p>But intellectual concerns about accuracy aside, my initial emotional reaction is one of terror at google's apparent omniscience. I mean, I already knew they know a lot about us, but this is pretty visceral reminder, complete with very pretty charts.<p>The use that's presented here is fine. Data in aggregate is fine. But there are questions that advertisers could ask that would be much more valuable to them if they knew who answered which question what way. Google could make a ton of money passing on the emails of people who answered questions in a way that makes clear that they'd be likely potential customers. They'd make more money selling other information along side the emails. Information about things like political leanings, sexual orientation, health concerns, if not already in google's database couldn't be too far away. Target already has a system for determining if a woman is pregnant: <a href="http://www.nytimes.com/2012/02/19/magazine/shopping-habits.html?pagewanted=all" rel="nofollow">http://www.nytimes.com/2012/02/19/magazine/shopping-habits.h...</a><p>Can google resist the temptation of selling that oh so valuable information? I really hope so.