With a true full time awd system like Subaru's Symmetrical or Audi's Quattro [most of the performance revisions anyway] if you step out of the gas too quickly mid-turn you will see the same effect as trail breaking and you will oversteer. The R8 V8 isn't all that powerful so imo he would get himself into less trouble powering out than pulling out of the gas after he loses traction. Of course, all the basic driver dynamics still apply like looking where you want to go and steering into the slide, and he probably lost the car from a series of mistakes, but if you start to slide in a car with these awd systems and pull your foot out of the gas, you WILL spin. Of course, this is based on my experience with RS4 and S4, the R8 may make use of the Lambo awd system in which case I will probably kill McGrunin with this advice because Lambo awd sucks donkey balls.
So discussing handling characteristics like trail braking, oversteer and why jumping off the throttle after turn in is as potentially dangerous as driving drunk... well lets just say its a pity more drivers don't understand this. A lot more.
I don't own an AWD vehicle though I have thown a few around a little pitch and catch auto cross course a few years ago. Also I have no real clue of the effects that any stability programs have on street cars near the limit of adhesion because I always shut that Shit off.