taberstruths - 1:24 pm on Dec 7, 2012 (gmt 0)
Google started crawling Facebooks Iframe about a year ago. So every link on Facebook is seen by Google. They still crawl twitter, and in my opinion G- is a flop. The chrome browser still sends data on how people get to your site, so that would still show the people coming from Facebook or twitter. For those that use Google Analytics they have that data as well even though they claim not to use it.