Yeah, there is definitely some lag, as there is with virtually any wireless controller versus a wired controller. That's just the nature of wireless controllers. But how bothersome it is comes down to opinion and also depends on the game. Even a slight bit of lag can really mess with, say, rhythm games. I know lots of people who can blow through PaRappa the Rapper on PS1 like it's nothing, yet they find it all but impossible to play on PS3.