Ivan is not reviewing the game. Which I'm not sure is something to be happy about because that guy is a huge, self admitted MGS nut (you should read his posts on the IGN MGS board) and the only thing he didn't like in the whole series was the MGS2 story, although he still ended up liking the game a lot. Also, MGS is one of his favorite games of all times.
Ed will be reviewing MGS3, and I think he said he never much liked gameplay in MGS games, for example.
Btw, almost every sentence in that preview is spoileriffic so I wouldn't even glance over it.