The "I Voted" button spread all over Facebook on Election Day resulting from heavy peer to peer appeals for turnout . Personal Democracy Forum looked back at those stats and found that Republicans on Facebook outvoted their Democratic counterparts.   PDF also found that the Facebook voter profiles by age matched those of most exit polls. To delve more into their analysis, check out the story: http://techpresident.com/blog-entry/facebooks-look-which-voters-turned-out-tuesday .