I think PDZ is supposed to make launch so why else would it be kept from reviewers unless MS is worried that the game may be a flop in terms of ratings? It may be a good game but it also might be a game that isn't review friendly. You know the sort, fun with good gameplay and decent graphics but absolutely nothing groundbreaking in any area. MS may not want a hyped up game to take a beating the week before the 360 launch occurs. Conspiracy theories are fun, no?
I'm still looking forward to it, and will enjoy it if it's anything like the original, but this may not be enough for many people and reviewers who are used to Halo 1 and 2 or other more modern shooters.
i will find out tonight if the game came in as i'm giong to get comics and stoping in the store , but it was on our shipping list this morning according to my buddy .