99.99999% of surveys upon social userbase outlets fashion towards 50% of all users being under 24 year's of age. My reasearch for this is based upon a finger i

99.99999% of surveys upon social userbase outlets fashion towards 50% of all users being under 24 year's of age. My reasearch for this is based upon a finger in the air and no other hard facts beyond recalling a recent G+ survey. Given this what % of user lie about there age (sexual equality has led males to stay 21 for longer), gender etc. What % keep it private. Do lurkers count and many other details that distract from the reliability % of any result. You never know, maybe in 100 years or so people might look at % based surveys as people most look upon horoscopes today. I would also perhaps argue that any age based grouping in anything other than age itself is ignoring the fact that some people do and can act older or younger than their actual age on many levels. It is perhaps the definition of the areana that the survey is based upon that should be weighted against the user. If somebody had written a program to analyis users posts to guage there age and gender to then come up with some %, then that would of been Hacker News.