The brain and body get used to the acceleration of a car after some time...
I learned to drive with a Golf III Gti with 115hp and i thought it was amazingly sporty and quick, then had an mx5 with 140hp, again i thought it was quick... until i got a 944 Turbo chipped to 290hp and 400NM, bloody hell i had the fastest car on the streets (at least i felt like that)! Then back to 240hp in the S2000... not as quick as the 944, but the revs... i felt like driving a race car...
Now my current toy is the Speedster Turbo with 260hp and 450NM, 930kg. 0-100 in 4.2s... the first few days i had pain in my neck from the acceleration... then got used to it but still felt it's bloody fast... now after driving it for a few months, sometimes i feel like maybe it's broken, which it isn't... your brain and body just get used to the power very fast...