"Flowtown created this nice infographic yesterday illustrating how the average age for social media users is increasing. For example, the average Facebook user is now 38 years old, and 64% of all Twitter users are now over the age of 35.

It would be useful to know what sociological factors are driving the increase, how are these age groups using social media, which countries and cities represent the greatest increases, etc."

I reckon it's because people over 35 have less of a real social life, spending more time at home and on facebook. What do you think?