Gaming Union: "When Assassin's Creed came out, people were quick to compare the PlayStation 3 version with the Xbox 360. One of the major differences came with the framerate, as the PlayStation 3 version frequently ducked below the 30fps mark.
This is clearly an issue which concerns some gamers, and could affect which console they buy the game for. It's also something that Ubisoft don't want to see repeated, as Gaming Union found out when we managed to catch up with Stefano Petrullo, a PR Manager for Ubisoft, to ask him if steps are being taken to prevent this."