Here is the Moz case study about "What happened after Google pulled author and video snippets" posted by Cyrus Shepard from the Moz blog site. Cyrus will discuss on how they closely monitored their own URLs to determine the effect of these updates on the actual traffic and the results is really interesting. Kindly visit this link for your reference and study this statistics for you to have an idea on authorship URL and non authorship URL. What Happened after Google Pulled Author and Video Snippets: A Moz Case Study - Moz