Facebook Graph Search test drive: Can the social networking giant find you a good restaurant?

Yesterday, on the day that Facebook announced the closed beta of its Graph Search, which enables you to search Facebook for nearby restaurants and music your friends like, among other options, Yelp's stock price plunged more than 7% -- and it dipped even further today. There's the fear that Facebook's search refinements will be a proverbial Yelp killer, but Yelp investors who are running away from the stock obviously haven't yet been able to take Graph Search out for a spin. But, Skift did. We can say that Facebook Graph, in its earliest incarnation, gives restaurant review site Yelp a few more years of breathing room (assuming that the latter can start making some money). When it comes to searching for near