Compared to other A/T and M/T on the market, the DuraTracs are on the lighter end of the spectrum. The lighter the tire the better the mileage.
A buddy of mine on TitanTalk has put over 20,000 miles on his DuraTracs and they look almost new. I almost bought them for my Titan.
I think I am leaning more towards these. The sipping and "snowflake" symbol will reassure my wife on our trips to Utah in the winter.