I indeed don't have much experience actually driving fast cars, but I do know how these numbers work on the track. I must say you have some very good points. However, the GT doesn't have as smooth of a torque/hp curve as you might think. The Benz weighs about 4000lbs (1950kg). But you have to see that my whole point is the muscle cars America produces are no longer what they used to be. The icon of American muscle has faded. My point is that the people in this thread hype American muscle, while more raw power and speed is even available in a 2 tonne (kg) German Luxury car. I would like to see how the American muscle from past and present is compared to the recent power war in Europe.
Oh, and Knigitt, the SL is that slow because it can't put all the power on the road. Traction and other factors limit it from reaching full potential. It is a shame of all the unused power however.. But that's what companies like Kleemann, Brabus and Lorinser are for. But it costs money. If Mercedes selled their cars with the performance parts Brabus etc offer (uber-quality racing stuff), the price would become too high for anyone to even consider buying one. They are happy with the power they can put on the road, and aren't willing to raise the prices much higher for a marginally small performance increase.
Just my 0.02$ , and lets continue discussing Drag Racing as a whole

. We don't want this to turn into an America vs. Europe vs. Asia war

. You all have good points, lets keep it at that. When GT arrives, we will see. Because after all it depends on how accurate the cars are in the game.