That's not accurate at all. It has an 81 on the PC, and a 77 on the XBO. You should either specify that it's just the PS4 version, or add in all the console scores.
http://www.metacritic.com/game/pc/watch-dogs
http://www.metacritic.com/game/xbox-one/watch-dogs
Also, Metacritic is bullshit. The Wii U version is already open to user reviews.
http://www.metacritic.com/game/wii-u/watch-dogs