TBF I wouldn't imagine that many RS3 owners are going to be tracking their car, or even pushing hard enough on the road to notice the catastrophic understeer that hero drivers so hate. It's pretty clear that the Audi isn't some tail happy hardcore weapon. It's a fast cruiser for covering ground in comfort and safety. Not everyone lives their life a lap at a time.
Also, and this is probably just me being over-cynical, but I sense some agenda in that video. It almost plays out like a commercial. Oh and the BMW is amazingly ugly. I'd discount it on that alone.