Maybe what he meant is that "Thunderbolt can accelerate to 500 mph within seconds". Poor choice of words, probably indeed, but knowing how they market fast cars, I suspect that's what he wanted to mean here.
Aw this looks wicked cool~ Yeah pretty creative the way you did this! You know it sucks that certain scenes from the Pokemon anime aren't on Sakugabooru. Not the scenes that's already there I mean the scenes that AREN'T there. Someone should really get on that. You know what I mean?