To remove screen tearing, they have to enable vertical sync, wich reduce the framerate (fps) of the game to sync it with the display. Unlike someone said, it doesn't mean you have 30 fps everytime the game get to 59 or below, it's not a "FPS divided by screen frequency must equal odd number" thing, it's a simple syncronization to remove half-fields, but by doing so the game is slowed down a couple fps, between 5-10. Furthermore vsync has the tendency to create a "sluggish" feeling in games below 60fps, especially in fastpaced action games wich GT is and if GT5 has vsync the control will seem unresponsive. Anyway screen tearing is an issue when you have over 100fps, at this rate there is as much half-fields as full ones and your brain sees them as they keep appearing in succession instead of having one of them pop once or twice every 60 passes, vsync is meant for high framerates not the other way around, low framerate and slowndowns are worst than actual screen tearing, this is why they won't fix it, the goal here is to obtain the highesst framerate possible for a more responsive control over your car and to do so they aim at 60, even if 24fps can fool your brain in believing it's in motion.
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sureley not...
