G+ has its set of users and it might grow in the coming days, but by integrating G+ with Google search they are destroying the sanctity of search. Having to sign up for a social network so that my blog posts can have my photo and name appear in search results is evil. Google can use existing microdata to achieve a similar result. But they want to push their social network down my throat if I want to make my website appear in google search with authorship data.