You gotta love the reviews on IMDB
The first few "critics" usually give it a 10 and just RAVE about it. A lot of time it's before the movie has been released, where they saw a 'screener'. How come everyone who sees an advance preview of a movie rates it a 10? My guess is that the only people invited to these events are cast, crew, and friends.
Then the REAL reviews start coming in and usually give the movie a rating of 3 or less!