The Michelin Pilot A/S 3 should get pretty good wear based on its UTQG rating of 500. But another factor in wear is the AA/A rating for traction/wear. This tires was designed by Michelin to really grip the road. Info from Tire Rack site stipulates:

"The Pilot Sport A/S 3 includes a W- and Y-speed rated Ultra High Performance All-Season tire member of Michelin's Pilot family of low profile, high-speed tires developed for the drivers of high-end sports cars, sporty coupes and sedans looking for total performance. The Pilot Sport A/S 3 tire is designed to provide Michelin's highest level of ultra-high all-season performance, emphasizing dry road handling and wet road grip while retaining all-season traction for occasional light snow."

Any tire with that much grip is going to wear. Curious that Michelin rated the tire life as 500 (which in any case is a dubious ranking) and said the tire would also have significant grip.

And based on feedback, wear on these tires is widely varied by XFire owners.