"Edit: @MM1000
Your argument only gives a thesis, but no supporting reasons or evidence. You say that the GT-R is a fantastic car, and that Ferrari's are accurately modeled, but nothing to address the question of whether or not PD is biased towards it besides "Kaz liked other cars, too" (that were also over represented, thanks for the Ford GT Premium, Ford GT, and Ford GT with no stripe, guys) "
Lap times have already crushed the paranoid and silly notion that the game isn't doing a great job representing the comparative lap times of these cars.
Also, it's absurdly unreasonable to demand I disprove a negative, and even more absurd and unreasonable that you're placing the burden of proof on me, rather than the nutcases who think there is a racist conspiracy by Polyphony to boost the Japanese pride. Sorry, there's also a mountain of evidence that these guys adore American and European cars anyway.
I'm not going to prove the Earth is round either.