Let's see...
Michelin Pilot Sport AS4 on the S600 (a 4500 lb car with 600 ftlb of torque) - holding up well.
Michelin Pilot Sport AS4 on the SL600 (lighter, just as much torque) - holding up well.
Michelin LTX AS on the Tundra - holding up well.
In fact, a quick measurement of the Tundra tread depth suggests an 80,000 mile life.
The SL600 has staggered tires, so, the tread life won't be great, but the car will age out the tires before they wear out given how much it is driven.
The S600 gets driven like a sports car, now and then. Big heavy car. Over 500 HP. Hard cornering, hard acceleration. The Michelins last pretty well under those conditions. I've got 10,000 miles on my second set of Michelin Pilot Sport AS tires. First set was AS3+, now the AS4. I don't have the exact life in front of my, but it was about 40,000 miles on the first set.
So, for a tire with excellent grip, on a car with incredible power, and how I drive that car, 40,000 is a great life.
I have been very happy with the Michelins on my cars.