"...reports
CNET. But the average number of friends one can truly
count on in a crisis is just four—which reflects one's
offline numbers, and is remarkably consistent across
backgrounds, gender, and age. Dunbar defines several
..."
http://m.newser.com/story/219294/150-friends-on-facebook-youre-close-to-only-4.html?utm_source=dlvr.it&utm_medium=twitter&utm_campaign=autotweet1
