We're lucky to have the game at all on 360. So everyone just take a step back and thank the devs.
Because another studio did the port and is probably doing the updates themselves too it will be longer. For them to make sure that the game stays consistent across all platforms they have to wait for the updates to be released before they can start work on the 360 version. These things take time.
And why are you all complaining like it's the end of the world when you don't even have as many as the revised amount is..? It's not like the update is the ONLY thing holding you up.