So - this is rather old news, but it only just popped into my head again. Last year I attended a Commonwealth Club Inforum lecture with the the founders of Yelp moderated by Greg Sterling. Yelp's mantra is 'real people, real reviews' and anyone who has looked for restaurant reviews online will not have been able to escape its influence, right there near the top of a google search every time. Love it (or claim to hate it but secretly refer to it every time every time you go out to eat), there's no denying Yelp's impact on the restaurant scene.
You can listen to the Yelp lecture via the link found here.
You might even find yours truly timidly asking a question just after the 49 minute mark. My bravado was, perhaps, dampened by the blush-inducing crush I have on a certain Mr Stoppleman...