I read both IGN and Gamespot on a constant basis, and though they both have their strong points, I feel that Gamespot wrote a better review.
First off they didn't moan about the graphics. This is a 256 player online only FPS. WE KNOW that the graphics aren't going to be on the same level as some other shooters of this generation. Anyone that moans about the graphics in this game needs to get themselves a clean nappy, and then take a look at a game like WoW. The graphics in that are far from award winning. The graphics do what they need to.
Also there was no moaning about "Oh SVER was winning so we changed sides". The whole point of this game is, win or lose, you are dedicated to your chosen faction and if need be it is up to you and your teammates to bring them back up from a losing streak.
The only issues that gamespot pointed out were valid ones that one should note before purchasing the game. IGN for some reason felt the need to state that MAG has low replay value due to the level cap being achievable if you work your ass off day and night for 2 weeks. What about the people that are playing it for other reasons?
Anyway.. Gamespot was more valid and fair. Thats not to say IGN was a complete load of tripe. But the scales of justice tip in GS's favour for this one.
