Agreed. Trip Advisor is a bad source for accurate information.
There is this Canadian guy that arrived "in the Dominican" a few years ago who bought a pretty low-end hotel in Cabarete. He decided to leverage TA as a marketing tool (probably because it was free...he wouldn't have to actually pay for advertising on sites like DR1...brilliant!). He had all his family and friends write reviews (large number of 5 star reviews from brand new TA users that decided to take the time to create accounts, and their one and only review was of this hotel). For a while the strategy appeared to be working. He even got his rating up to #1 (in it's hotel class...not a "full" hotel), and this became his marketing slogan. "Come stay at that World Famous XX Hotel, rated #1 on Trip Advisor!".
He spent lots and lots of time policing his rating, responding to each and every negative review, somehow getting many of them removed And those that he couldn't get removed he made bizare accusations against the reviewer. Kind-of weird, but again, that was the marketing plan.
However even with all this manipulation, his rating went from #1 to #5 (in it's class) in the last 18 months.
Bottom line, the truth eventually comes out, but I would never book a hotel, or go to a restaurant, based on a rating on Trip Advisor.