I am guessing most people who post here should be around 16-25. But that is just guessing. Everytime I receive a sticky mail or reading a message, my mind would come out 'hey, how old do you think he is? older than me? younger than me? or same age?' also sometimes I wonder how many ladies are actually posting here. I bet < 10%, since all the girls I know show no interest in what what SEO,web site ... all they like is icq and irc. :)
Maybe we can get a rough idea of the webmasterworld population by taking some samples. I am a guy, 22, how about you?