well, first off, i don't know too many that can afford a $70k car that would be stupid enough to take it in the snow or mud. hell, if they can afford this car, they can afford a second vehicle, 4wd, that could be better suited to snow.
second, whether or not nissan really intended for the "launch control" to really be used as launch control... they never stopped the press from advertising it as such. they also never said anything when motor trend, car and driver, and whatever other magazines tested it, in their presence using the technique. in fact there are several articles from when the GT-R came out that had nissan engineers on hand for the mag's testing the car, showing the testers how to use it.
they would continue letting the car be advertised as such and not say anything, then when trannies started breaking, they suddenly said "oh, it was never intended to be used that way, it's not launch control, it's get-out-of-snow control - you're fucked on your $20k tranny"
nissan still = fail