I use Google+, and I find the quality of the comments are very sophisticated because there is more trust inside of Google+ than there is inside of Twitter and Facebook, for example.
Eric SchmidtThe funny thing about advertising is that it's not a zero-sum game... Historically, in the digital ad world, pie has gotten larger and it's possible for everyone to win, and it's perfectly possible that will continue to be true for quite some time.
Eric Schmidt