If anything, I think Google would be trying to find a way to make social media a stronger signal in the algorithm (something they've been struggling to do for a few years now), as opposed to give sites a beating for it.
"The Google “Zebra” update is both rumor and an SEO inside-joke. As of today, there is no Google Zebra update. The myth arose after comments Matt Cutts made at a conference regarding merchant quality. It was dubbed “Zebra” because Google seemed to favor black and white animal names for their algorithm updates aka “Panda” and “Penguin” (the recent Hummingbird, not withstanding!)."