There Is One Thing Missing From Google's +1 [OPINION ...

The concept, revolutionary enough, is that instead of trusting a search engine's algorithm to deliver the most relevant search results, one should trust their friends' preferences, along with the preferences of all other searchers. ... We are also largely comfortable trusting the feedback of strangers, whether they tell us a book on Amazon is worth reading, a hotel on TripAdvisor is clean, or a restaurant on Yelp has the best lobster frittata you've ever tasted. ...