I have no problems with their scores, but Gamespot's editors blow. They have the most poorly written reviews of the 3 major sites, and that includes 1UP. Here is a snippet from their Mass Effect review:
"The Bad: Vehicle navigation and combat are weak
Combined with an exciting and unique combat mechanic, it makes for a fun and absorbing experience that you'll want to see through to the end."
That's not as bad as their Metroid Prime 3 review though where they complained that they stuck too closely to the formula then a paragraph later said that too much was changed in the formula. I care about the content. Not the scores.