Interesting debate this - even if it has gone a bit OT..
Quich question though... Why are F1 cars rear wheel drive if 4WD is meant to be better road AND track?
4WD in f1 was banned in 1969. Alot of the top teams flirted with the 4wd system, although its was really under-developed, no one put their full weight behind it, a bit like the turbo era, until renault did and after a few dismal years started to dominate and everyone followed suit. Porsche f1 had a system in 1948 in which the driver could switch from 2wd to 4wd from corner to corner.
Having said all that, im not sure F1's current age of super aero development would benefit from 4wd, its definetly alot more applicable to cars that dont benefit much from aero downforce.
Audis lemans hybrids are technically 4wd under max power also as the motors are fitted to the front axle