The comments in that article are all favourable about the requirement to link to G+.
I was 100% against G+ and the whole profile thing at first but over the last few months have come round to the idea. I strongly believe that any attempt at anonymity on the internet is impossible and misguided, so I have gone the whole hog and accepted G+.
Certainly it will help keep reviews a little less polluted with self-written praise.
G+ does have advantages for websites in the SERPS and in other ways. Agreed my pic in the SERPS is not exactly a fashion statement but then again I don't think users expect it be anything other than a pic of a normal person.
I am trialling another pic (from my partners account) on some of our pages which shows off her charms in a rather obvious way. At the moment there appears to be no difference but more time is required.