Around 25k...tires still look good considering I do tow a travel trailer in the summer months and my truck is a 3/4 ton, we will see how they are this snowy & cold winter.
I used to have a winter set of coopers just for my old truck and ran TOYO's in the summer, when I decided to buy new tires for my current truck, i decided not to go with the 2 sets of tires for this one, and out of all the folks that I talked too before buying these tires, I could not find a person that did not leave the DT on all year.
Personally I have hated GY tires for a long time, but other than people complaining of uneven wear on the DT tires, there is not a lot of bad reviews on them. The uneven wear is more times than not a lack of tire rotation or maintenance to the vehicle, not the tires fault.
The other 2 on my short list were the TK02's, but they seem to have "reported" side wall issues, so that was a concern and the TOYO AT2's were the other one on my short list for an all season/winter LT truck tire.