GT5 has been around to long. People know which cars are fast and which arent.
If this H2H pink slip was created a week after release more people would join.
Everyone knows the ferrari 458 is not as fast as it should be, even fully tuned and how the Supra goes 389 KMH fully tuned.. etc etc.
Now its pointless. As soon as you mention car, people know what car to use or not to use.