I do 100k miles+ every year, this is definitely a thing, i get it in the bus, which has a 100kmph speed limiter.
I get it in the car, (diesel 4×4)
I got it in my old car (mpv)
I hear many other drivers saying the exact same thing, and I don’t just mean on here.
I think it’s partly ACC vs foot, and partly drivers who do it aren’t really paying attention.
Eg: if they’re not paying attention, the first time they see an overtaking bus is when it’s beside them, the automatic reaction is to put the foot down.
See also, people who crawl past you on a motorway/dc, then slow down when you reach a hill, you overtake them, then never see them again.
I never used to get it on the bike though.