I've long believed that Youtube was Google's main social network, even though they never treated it as such. A strong hint for that was that Youtube, along with

I've long believed that Youtube was Google's main social network, even though they never treated it as such. A strong hint for that was that Youtube, along with Twitter and Facebook were used for revolutions. I think it's almost like a litmus test by now - to see if you have a mainstream social network, watch if it's used in revolutions. All they need to do now is to use Google+' real time commenting system, and integrate Hangouts a bit deeper into Youtube.