I don't personally have a set of these, but I think I can make a good prediction about snow performance based on driving through several snowy winters on BFG A/T's.
When a tire has big sharp shoulder lugs, like the duratrac and BFG A/Ts, they really claw hard at snow when you're offroad. They are great for that. But driving partially plowed highways is another matter. Everything is great until you drift a little out of the tire tracks through the snow left by the cars in front of you. As soon as those shoulder lugs hit the 1" of snow at the edge of the tire track, they just get sucked in big time. This happened to me again and again with the BFG's, once it ended in with the exploder doing circles down a two lane road at 40 mph. Luckily I was able to pull it out of the spin after about 3 times around. I loved these tires for their snow traction, but they were downright scary trying to drive down a partially cleared road. I now have some Cooper Discoverer H/Ts on there (got a real good price on 265/75R15) and I'm confident the nice round shoulder of the H/T will be much better on snowy roads.
But like I said, this is all based on the BFG's. I'm interested to hear if the duratracs share this issue.