Google quietly announced on Google+ that in the next couple weeks they will roll out a new advertiser report within the AdWords console to show advertisers how well their automated ad extensions are performing.
Some AdWords extensions are simply automatic, they show or not show based on some criteria. Since you don't turn them on or set them up, the reporting has been pretty limited. Google said in the "coming weeks," they will be "rolling out a new report in AdWords that shows you how your ads perform when they appear with automated extensions."
This report will help with some ad extensions, specifically the consumer ratings and seller ratings ad extensions, which don’t require setup and will automatically appear with your ads if your ad meets certain criteria.
Forum discussion at Google+.
