Water is wet, fire is hot, and an above average amount of luxury brand drivers are assholes. I didn't think you needed a study to prove any of those statements.
Unfortunately for BMW/Audi/Mercedes and lets add Land Rover and specifically the Porsche Cayenne/Macan, entitled pricks are drawn to those vehicles to flex. If you gave those people the very same vehicle but slapped with Kia or Hyundai badges, they wouldn't drive it.
They seek out those vehicles like a fly to shit but it's their sense entitlement that causes them to be perceived as assholes. Examples include:
- Thinking that the roadway is theirs and that other people need to move out of their way. Result: No turn signals used
- Thinking their time is more precious. Result: Cutting over a solid line ahead of a long line of traffic.
- Not thinking of how it will impact others. Result: Parking/stopping in places they shouldn't be
Now don't get me wrong, there are other brands that display other forms of entitlement that also need to be dealt with (Toyota drivers doing 99kph in the left lane comes to mind), but it's the things that the luxury brand drivers do that come off as the most asshole-ish which is why we focus/criticize it the most.