I may be all alone on this but here's what usually happens to me. Some guy in a new 'Vet or whatever sees me and nails it. I'll follow him close enough for him to know I'm there but far enough away that if he looses it he won't take me out.
I've found, almost without exception, they can't keep the pace and usually flag me to go by after a few minutes.
I've always thought the intensity was too high for most people to carry on more than 3 to 5 minutes. It appears to be mental fatigue.
When most cars are loosing traction I'm still not scraping things, however. These are really twisty roads I'm talking about. Most cars seem to start to struggle before you get to triple the posted limit.
In the canyons where I live I see this as the other way around. I have yet to run up on a car that can keep pace.