Personal observations:
It is rare for a Porsche driver talk to talk to you if you are as fast, or faster than they are.
Porsche Drivers won't talk to you if you are as fast, or faster than they are and you drive a Corvette. A couple of us sparred all day with a fast group of 3-5 GT3 drivers and each had outstanding video of each session. In-between sessions they were all sitting in a circle talking to each other. I walked up and said "Hi guys, I was driving the silver Vette." They looked up, looked back, and then ignored me.
Ferrari drivers are cut from two groups:
1) They are fast, don't talk much or socialize at the track.
or
2) They complain that you passed them too closely even when you are 20ft+ away.
Lamborghini drivers are maniacs:
2-3 cars abreast entering T1 at Thunderhill.
Very aggressive control inputs, not smooth at all.
Saw car-to-car contact at the two Lambo trackdays I drove.
Was told by cornerworkers that every Lambo day has at least one car going home on a trailer due to a crash or a John Deere moment.