No, it's because you have to move like a retard to use accelerometers. You see, the brash movement of the controller turns the in-game ship. However, like PGC said, it'll recenter itself after sometime.
This is very unlike the Wiimote in that it nows when you recenter it and when you hold it in an angle.
Basically it's this:
With the PS3, you can not turn forever unless you keep making the movement needed for you to turn.
With the Wii, you can turn forever by simple holding the controller in a turned position.
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