Here's the thing right. Assuming both cars are equipped with DSG and both have an equal power figure (for arguments sake 265bhp) then the FWD will eventually beat the 4WD due to transmission loss.
For those that don't know what that is imagine running around on your two legs and compare this to running on your arms and legs (all fours). Sure you might have better grip but you get tired quicker because your using more of your energy to drive yourself forward. Same thing with cars.
So I can only guess that the GTI in that vid was not much more than standard power. It certainly wasn't putting out comparable power figures to the R.
My other complaint is that the GTI jumps the R at the start. For this reason I also think the GTI was not that powerful.
My final complaint is that the race is done in the rain. Surely they could have picked better conditions for such an important face off
