But 98% of M3, 911, or AMG owners will never take their car to the track or engage in such long-duration, high-performance jaunts. So I don't think the comparison is as unfair as you make it out to be.
Realistically, it's probably more like 99.9%, if we're talking about new car purchasers. Out of the box these are trophies, not race cars.
I bet the percentage of people taking their car to the track is actually quite a bit higher if we're talking about, for example, used 911s. I don't know if that will hold true forever, though. There are a lot of super expensive parts on the newest cars.
Yes, many drivers won't ever drive them to a track; however, when you look at general attendance at public road courses, 911s (and less-so M3s) appear to be grossly overrepresented in proportion to their street popularity.
I think it is safe to say that less than 2% of automobiles are ever driven on a track, so assuming the 98% figure is correct, you would expect to see exactly what you describe.
If 2% of 911s and M3s were regularly driven on a track, I would expect tracks to be full of them.
I bet the percentage of people taking their car to the track is actually quite a bit higher if we're talking about, for example, used 911s. I don't know if that will hold true forever, though. There are a lot of super expensive parts on the newest cars.