Definetly true. Fast paced driving and shooting games((which includes GTA in both areas!)) also helps hand-eye coordination, and it raises reflex. I think there was a study about that. But those are pretty much common sense if you think about it. You have to get faster and faster at responding to whatever happens in the game, so your reflex gets faster. Especially in shooting games, mostly FPS, probably. Driving games I would bet helps your coordination.