A snow tire is not a mud tire. A snow tire is designed to pick up snow, snow sticks to snow. A mud tire is designed to shed mud, mud does not stick to mud. Duratracs are a hybrid of snow and mud, they do both marginally but will usually outperform a dedicated tire doing what it wasn't designed to do. In short, most MTs suck arse in snow and most ATs suck arse in mud. Id take Duras anyday over any other AT I've tried, Hankooks and BFs. But they are still marginal at best in any given situation, they are just a more aggressive AT then norm, no magic involved.
I got my tires from tirerack, paid high for shipping and only reason it was worth it was the rims I also ordered.