Yes, of course we are talking generalisations and there are always exceptions.
What I will add though is that if I see somebody in my rearview mirror "right up my chuff", chances are it'll be an Audi. Ten years ago it would likely have been a BMW, so there must be some sort of 'gravitational force' that attracts a certain type of driver to a certain type of vehicle.
Around here I get all sorts tailgating me.. I think it's cos I am an old fart driving around at 30mph which many find annoying. Doesn't seem to matter that it's a 30 limit..
The audis that I see being driven agressivly, doing u-turns and stopping to chat with another coming the other way thereby totally blocking the road are usually high powered ones with blacked out windows.. and quite a few mercs seem to be joining this club.
It's the same type of driver in these cars, many of whome seem to be above the law and do just what they like.
I am not sure why audis have become their car of choice cos they are expensive.. especially for people who dont appear to have a job...