I have the stock Duratracs and they absolutely suck in the rain. I'll feather the throttle from a dead stop and still be spinning out. I'll even fish tail at times if I'm making a turn while lightly hitting the gas.They aren't BAD in snow. Just not as good as the Duratracs. Thing is, there aren't many tires that are as good in the snow/rain as Duratracs. That's why so many use them despite the noise and ride quality issues.
If you are looking for a Duratrac alternative, check out the new Territory MT. I'm running them now and so far very happy with my purchase. They seem to have the Duratrac's bad weather ability but with less noise and weight.