Bddmed - 9:07 pm on Jun 29, 2011 (gmt 0)
Watch Google to start saying that +1 is crucial...blah blah...add it, we will not penalize you if you don't but...blah blah.
Well here it is:
But when you’re managing a website, it's usually not real until you can measure it. So we’re happy to say we’ve got one more announcement to make -- today we’re releasing reports that show you the value +1 buttons bring to your site.
First, +1 metrics in Google Webmaster Tools can show you how the +1 button affects the traffic coming to your pages: