Anecdotal 'evidence': I'd say 10-15% of my friends list (age 24-28) have left Facebook. Some users just focused on websites catering to specific communities.

Anecdotal 'evidence': I'd say 10-15% of my friends list (age 24-28) have left Facebook. Some users just focused on websites catering to specific communities. Some just focused most of their time on Twitter/Tumblr. And some just realized they got by day-to-day without a social network and elected to get out of the game altogether.