I must admit you may be right about the engine, although it will learn your driving style (it takes a few miles to get out of fuel saver mode (my name for my OAP style driving

) to get back to race-car mode), and although the engine doesn't differ between 5 & 3, I can't say I worry for power in mine, and it may be the way I drive or the way it has been run in, but it seems fine to me for annihilating quite a few cars out there (especially older Golf GTI's

Especially if they arn't expecting you

). Remember the car, if it's a tester is constantly trying to adapt to different driving styles and will consequently not respond as quickly as it should.
ATB,
Tom