As the number of social networks and activities performed grows, there's no comprehensive way for marketers and publishers to see the big picture of how social behavior really impacts their brand, let alone understand how these social actions lead to engagement or true return on investment (ROI) of their content.
That's why we've developed the social data hub - so any network can integrate their activity streams - like +1, votes, and comments - into Google Analytics Social Analytics reports, which will be available next year.