Some interesting analysis from Brian Solis (courtesy of data provided by Pingdom) that suggests that the average Twitter user is 39.1 years of age, most likely female, and that all of social media is dominated by persons in the 35-44 demographic.

The Average Twitter User is 39.1 Years Old (And Probably A Woman)

Twitter isn’t for kids, at least not at the moment. Some 65% of all Twitter users are over the age of 35. This is good news for brands and marketers – there’s lots of disposable income there. We’ve suspected, and even known about this age-bias for some time, but it’s nice to be reminded of what increasingly appears to be a fact.

Of course, statistics can be misleading, and you certainly have to be very careful with averages. If you think about it, the ‘average person’ has one testicle and one breast. Still, Brian’s study is excellent and well worth a moment of your time.

PS. Brian’s new book, Engage, is out now, and I’ll hopefully be reviewing it very soon.