I just checked out this site for fun then I found football clubs leader board from facebook which was interesting, I can't post everything here because I am too lazy but when you go to the site, you will find growing trends for clubs online! Some are faster than others

I just posted the important clubs in my opinion

http://statistics.allfacebook.com/pages/leaderboard/-/-/-/f/desc/334

Name # of Fans
FC Barcelona 22,273,550
Real Madrid C.F. 21,277,026
Manchester United 20,305,701
Arsenal 7,939,767
Chelsea 7,640,764
Liverpool FC 7,401,496
A.C. Milan 6,544,575
FC Bayern München 2,439,851

I read that Manchester United started the facebook page very late after all the other ones were up there for a while and they said they went from 0 in a few months to 20m, which is impressive :D:D:D

Well United did start their facebook page later than everyone else, but it went from 0 to 20 mil. In around a year, not in few month. Also Galatasaray has 6,158,723 fans on facebook and Fenerbahçe has 5,000,236 fans right now.