The third ad above is the first I have seen with both a seller rating extension and a +1 message.
For premium position ads, the +1 message adds an additional line to ad copy. Meanwhile the seller rating extension appears next to the headline and features colourful stars which stand out.
This particular ad/landing page has a high volume of +1s however the fact it is written below the ad in grey means that the impact is lessened. It is likely a user will have decided whether or not to click prior to reaching the +1 line. This seems like Google is not yet confident enough in their social pretensions to really push +1 to the forefront of the paid search space. with this layout I do not think the +1 is contributing to Adwords performance.
What are your thoughts? Leave a comment below.