"A statistical analysis is in order, not subjective analysis where viewpoint can cloud observation." Exactly! It takes just a moment of review of Yelp! reviews in almost any category to disprove the generalization asserted by the asker here. But a statistical analysis comparing the reviews of Yelp! advertisers against those of non-advertisers could be very enlightening. Expensive proposition, however.

"A statistical analysis is in order, not subjective analysis where viewpoint can cloud observation." Exactly! It takes just a moment of review of Yelp! reviews in almost any category to disprove the generalization asserted by the asker here. But a statistical analysis comparing the reviews of Yelp! advertisers against those of non-advertisers could be very enlightening. Expensive proposition, however.