Often yes. Got a set of Michelins warrantied. (Cracks in the tread, plus I hated the lack of traction of those long wearing tires.) They were about 2/3 worn, maybe 3/4.
I’m not the original purchaser (which means I should have not gotten anything).
They didn’t give me any hassles at all. Didn’t ask for any paperwork or receipts. Gave me 56% back of the price of my new (and way better) Michelins. I was expecting nothing and hoping for maybe 25%.
Yeah, I like Michelin. Picked them cause of reviews and TireRack tests (warranty claim was an afterthought when they were being replaced anyway). Nice to see they back their warranty more than they have to.
YMMV, but they were good to me.