[pseudohippy]

From what Ive read somewhere to which I dont currently know the link, oh, somewhere on IGN about Halo 3. They were saying that some games will run worse after installing on the HDD due to all sorts of technical speech about how the game was set up originally. Bunjie actually reccomends against installing Halo3. They did all agree however that now that developers know about the HDD install they can develop for that and eventually the new games will have significantly quicker load times and optimize the new ability to load games.