Yesterday we discussed how the interdependence of +1, shares and comments influence the ranking in the personalized Google Search, the social graph search of Google.
And the author rank resulting from the interaction and engagement of the audience is a major part of the mechanism how the search rank of a post is calculated. Even in the general Google Search results without a login and without social classification, it plays the main role. Authorship matters and the role of link farms faded. Even links depend on the value of the author who used them.
Update: Somehow not everybody can zoom into the picture, here is a link for it http://www.verticalmeasures.com/wordpress/wp-content/uploads/2013/11/The-Author-Rank-Building-Machine.gif#