I'm surprised the cobra won on that specific run. My experience has been that the cobra gets the jump out of the hole, and then has to hang on at the big end (Of course that experience is against a modded ZO6). From the video, it looked like the cobra was losing, then he passed the ZO6 in third.
That looked like a drivers race. Looked like the Cobra was out in front at the very beginning, was passed for a few seconds then made it back up at the big end. Maybe some crappy lowend shifting for the Cobra or the same for the Vette at the end. Either way nice kill.