Luxury and speed don't have to be mutually exclusive.
This is what sets the 599s and DB9s apart from the Corvettes of the car world. The belief that both can be had, but that the owners have to pay for it. GM believes/ed that the owners where not willing to as so did not aim to develop the car in that vein.
The Veyron is just the ultimate example of this work. Reading the evo interview with Louis Biochhi he is extremely happy he managed to make the car handle so well. Despite it being massively heavy it is also apparently quite nimble.
Chief of Secret Police and CFO - Brotherhood of Jelly
No Mr. Craig, I expect you to die! On the inside. Of heartbreak. You emo bitch