I had one chasing me a while ago so I stepped it up a bit and he kept up well. He tried to pass, but couldn't, it was fairly even on a long straight from 20-60... then we hit the on ramp and I thought I would bury him, but he did keep up fairly well... although there was some serious tire screeching I was hearing from his car... I thought he was a bit nuts... he was really pushing it to keep up.
We hit the highway and he still couldn't out accelerate me, nor could I really pull that much on him... I slowed down at about 75-80 because I don't like street racing and he finaly blew past. I was impressed with the thing...
I later drove one. Its quick... but its definitely a truck. And a pig on natural resources if you ask me.
Anyway this is with no supercharger on my car.