Although I definitely understand what you mean, would it be a reasonable assumption that "not getting into it" on the Sapphire is equivalent to dumping the throttle off the line in a 5 series?
I do wonder why the efficiency is this high, though. Even with stickier tires, worse aero (in terms of drag, nothing else, although it is still quite fantastic), and the obvious HP advantage, it is getting within spitting distance of the DE-P. If you have figures for it, what do you get by going the speed limit on a highway?