Thoughts & Ideas
Facebook vs Schema.org
Facebook looks lonely among the competition as the only one without rich snippets to display star rating for their aggregate review results.
To take this even further, Facebook has twice the amount of reviews/ratings (816) when compared to Yelp (361).
All they have to do is utilize the http://schema.org/Review standard to help search engines understand the page…. and for us to be able to crawl it. 😉