I have absolutely no doubt that there are a few exceptions to the rule, but does anyone really know anybody who drives an Audi sensibly.? Or a beemer? I'm sure they're out there, somewhere, some place but to me, if someone goes flying past me way over the speed limit and weaving in and out of traffic with, I can only assume, broken indicators as they never seem to work, I can take a fair guess as to what they are driving and it won't be a Yaris.
There is actually an arguement for banning cars with powerful engines, from a safety and environmental perspective. Why not make speed limiters mandatory or link fines to the size of the engine, the power of the car and the wallet of the driver. ?