I'm a bit confused by the recent outcry about relevance. Do people disagree that social signals can add to relevance? If not, then how does Google get these social signals, if they're locked out of FB and twitter?
It seems like a pretty clear strategy to me of simultaneously trying to grab as much social signal as possible by creating a meaningfully competitive social product, while also demonstrating to its competitors the value of allowing Google access to social signals.
I find it strange that everyone seems to want Google to just keep doing what it's been doing, to, in a word, stagnate. I, for one, am happy to see Google continue to do big things, undertake big initiatives, respond to a changing world.