Fair point Howard. I had a torrid time dealing with Audi around the problems with RS6PE 21" rims failing. On the Audi three of the four rims went after 6000 miles and so I am happy to say manufacturing failure was the issue. Other cars have also suffered this.
The issue here is the state of roads. Some of the pot holes around here could count as swimming pools on expedia. There is a fine line between failure (Audi) and some of the road wreckage? If it is one wheel then I am inclined to put it down to other factors ? It could still be a single wheel failure as you suggest ?