Something that has seriously increased my trust in Yelp:
There's this one restaurant that has always been my favorite within 100s of miles and recently I noticed they had a top 100 in the USA poster for their cuisine on the outside from Yelp. It doesn't mention what rank specifically, just top 100. I look it up and they are in the top 10.
So I really have no idea how Yelp was able to figure out that this restaurant is so good and to rank it in a way I agree with. It could be just based on reviews because it does have close to 5 stars but regardless it's impressive.