Reviewing threads, observing inputs from people giving away free information on age, location, sex and social structure dynamics it would not be unreasonable to make the mostly caucasean, working to middle class and within the western world observation.
How would you have any idea of my age/social structure dynamics/race, since they're not on my profile? And even leaving aside the fact that many profiles don't have those data posted (or the data may not be truthful), have you inspected every profile on AVEN?
There's no point in making assumptions about the demographics of AVEN, except perhaps to say that AVENites skew toward being younger than 40. Even that is suspect.