I don't get what all the fuss is all about. Why would you want to hide your identity unless you are writing something crappy or being a troll on Youtube or Play Store. A single sign-on service is a great decision and that't the way things should be when you have multiple services from same company.

You guys don't mind using all services like Spotify, Quora etc that are so closely tied up with Facebook login. But when google tries to integrate it's own services it is so wrong? What are we, Hypocrites?

Coming to Google+, it is a much better designed and well thought off social network. What is the whole issue about?