Probably less cheats because of the fact that all game saves on the 360 and now the ps3 are tied to the account and cannot be shared.
Some games need cheats, especially when the player encounters a really tough section, (snowstorm anyone?
)
Personally, I think great games should have just the right difficulty level, but this is hardly ever found, ocarina of time proved this, as did gta 3.
In respect of the orange box the level select cheat would have been useful for those who did not complete the pc version and left it half way.