> (To me the most interesting thing about the concept is that you can immediately tell from people's reaction to it which category they personally fall into.)

It reveals things about other people, but also about oneself. For example, I always assumed that people were just afraid to ask and answer questions honestly; until I read that post, I was not aware that there was any cultural choice being made. And so I learned that, partly through upbringing and partly through choice, I was an Asker; but that people who were Guessers were operating on an equally sound footing to mine, just from very different assumptions.