Google Authorship Question - if you search for "plumber harrisburg pa" the 1st listing displays Rick Williams - https://plus.google.com/u/0/109466438213087804558/about
If you look at his G+ profile he has 2 followers.
The same goes for a search of "attorney harrisburg pa"
A little farther down the 1st page you see "Jonathan Crisp" https://plus.google.com/114484730848145543545/about
His G+ profile has 3 followers.
What makes these two authoritative enough to be displayed in the results. I was under the impression part of the influence was from who was following the person, as in how much authority the followers had.
I loved when my clients image showed in the search results. It helped their click thru rates.