Let me clear things up here. I'm the driver of the Z06 in that video, and although I have full confidence my car is faster than an SRT, that guy had problems with his engine. He was not putting enough oil in it!!!
He ended up blowing the engine on the second run. I also am not sure if he "stays in it" I've run him several times, and it seems like after I start pulling on him he just drops back immediately. I can't prove that he isn't on it the whole time, but that's what I think is happening.
I also raced a modded '98 GTS with 445rwhp from a 25mph roll a bunch of times. I had worse traction than him, so he'd have about a half a car on me from the punch. But every race, by time I was getting to the top of 2nd gear at about 80mph (one time 90) I'd have a full car on him, and we both agreed I'd of probably started pulling even harder the faster we went.