Now that the weathers nice, I've been walking most evenings. A fair number of high end cars around.
Regular vehicles drive past without paying any mind to pedestrians. Almost to a person, the people driving the high end stuff are looking at pedestrians to see if anyone is watching them at them. Starved for attention that lot.
Not sure what neighborhood you live in but that is not the norm. Plenty of people drive nice cars, don't act like jerks.
Last night it was pretty much one for one. A few Corvettes, a few convertible Mercedes and BMWs and a few Porsche 911s. All recent vintage, all striving to make eye contact with pedestrians. Most of them with a single hand flopped over the top of the steering wheel and bodies slouched to the side. That's what made it noticeable.
You're right. It's certainly not universal behaviour.
There's a guy somewhere close that has a new Bentley GTC. I've never seen him do it. Just another Joe in traffic. The same with the guy driving a Ferrari California. I've also seen him take the time to talk about his car with a dad and his son, who were admiring his car as he came out of a bank downtown. That was pretty classy, I thought.
The Harley and sportbike guys are the other groups that I find stand out for peacock behaviour.