Have search marketers begun to place too big a bet on social media's impact on search? That's a question Wil Reynolds asks. He doesn't suggest it has no impact, but rather presents data that points to social signals holding "very little weight" that directly affect search engine rankings. He takes us through the method to prove his point, and tells us that Google fails to use social as a strong signal. Aside from Twitter and Facebook, he writes that Google should have the ability to identify shares and consumption better than any other company -- but something is still missing.