Dunbar's most recent research suggests even power-users of Facebook with 1,000 or more friends still communicate regularly with only around 150 people, and of that 150 they strongly communicate with a group of less than 20. - David McRaney - You Are Not So Smart: Why You Have Too Many Friends on Facebook, Why Your Memory Is Mostly Fiction, and 46 Other Ways You're Deluding Yourself - QuotesSweet