IMDB isn't really a good meter of critical opinion, its score is based on the opinion of its users. Rotten Tomatoes is the one that aggregates opinions of the critics. That said, his movies usually get 80%+, which is pretty good.
On some new movies the rating is very high, but it goes down sharply.
IIRC one of the Fast and the Furious "movies" had a stupidly high rating, which is now more sane.
https://www.rottentomatoes.com/franchise/the_fast_and_the_fu...
IMDB seems to suffer from this less.
The only useful thing on RT is their one line blurb.
If you see Furious 7, for example, it has a Tomatometer rating of 80%, but the average is just 6.6/10.
(Note: you have to open the movie page to see the average rating)