From my own anecdotal experience, the filtering is crap. I just reviewed a local restaurant recently. It happens to be one of the best restaurants in town. It h

From my own anecdotal experience, the filtering is crap. I just reviewed a local restaurant recently. It happens to be one of the best restaurants in town. It has only one review on yelp, a 1-star review, from someone who seemed to have unusual expectations. It also have 2 filtered 5-star reviews from people who loved it. From what I can tell, all 3 reviews were kosher. Unfortunately because yelp incorrectly filtered the two 5-star reviews, the restaurant has an unfounded poor reputation on yelp. I left a 5-star review, and as far as I can see my review isn't filtered (at least, not when I view it). Perhaps that is because I'm a long-time yelp user.