I think RonMAIDEN meant he has 20,000 currently, not that they are worn out already.
I have had my duratracs for almost 10,000 miles and the tread depth looks good still. I haven't measured it recently though. And off-road mine have done all I have asked them to. There are better off-road tires out there but the whole idea with these is that they are a good middle ground between M/T and A/T.
I wouldn't hesitate to buy them again.