Couple of questions - manual or automatic? What PSI do you run on pavement? Curious about your ability to get rougly 1.3x more miles...(I replace them a bit early too). Is your jeep heavy (or loaded down with cargo like mine)? I have a 6sp manual, and run 30-32lbs. (anything softer and find there is too much roll). I rotate & balance every 5-7k miles.
I've had to replace 3 tires due to sidewall issues - one was a stick on a trail, one was a rock in my driveway, one was a piece of metal on driving on the freeway. Never had to replace a tire prior to the DTs - might be luck I guess. Never had a flat either...then I had 4 in a month on 3 different vehicles...luck of the draw maybe?
Those that comment about not noticing tire weight - depends on the use case & vehicle.
The jeep is a relatively light vehicle - I tried a set of heavy E-rated ATs (the brand is escaping me at the moment) and immediately noticed the weight. I yanked them off and went back to the DTs. (I have an '07, 6sp, 4.10s). On any my lighter vehicles (Corolla, K10 Suburban, Jeep, Audi etc) - I immediately noticed the additional rotating mass of either heavier wheels or heavier tires negatively affecting stopping distances and therefore have tried to balance rotating mass against need.