Lot of contradictory information. I'm personally testing whether social signals do something or not. There are people who say social signals can help you to rank and some who say that social signals have no effect on rankings. There was that case study here: www.blackhatworld.com/blackhat-seo/social-networking-sites/739541-case-study-can-i-rank-100k-social-signals.html Interesting information but it appears that the person cleverly did the case study to promote his own services. I don't have enough data to say that signals play a impact on rankings or not. Based on what I've read there is a role. It is uncertain to how big of a role it plays thouhg. Now, my question is this: Has social signals helped you rank? And, it is preferred that people who have actually experimented with social signals comment. Thanks.