I guess I'm the flips side....
I wash it shortly after I offroad it(within a week), I don't have worn out parts as someone suggested....and I've driven over 1,000 miles in one trip to Disney Land with the kids...
It all comes down to proper maintenance,...for all those that have found "worn the F out in 5 minutes"...it's because they were like that prior to an offroading excursion, and it's a good thing you found them at a slow speed(offroading), rather than at full speed on the highway.
i agree with tank