Didn't read the thread, hope this is relevent.
Absolutely SMASHED my Felt XC up some stairs with all my weight over rear wheel yesterday, made such a loud noise that everyone within 30 meters turned to look. I was running Mobsters with thorn proof tubes on a Dice EFD rim. The tyre went flat instantly and I expected to look down to see a dead rim too. Nothing of the sort, I cant believe that there wasn't a trace of impact anywhere to be found on the rim. I know some people don't like them but I can't talk them up enuf! I've never hit anything so hard before and had no damage to show for it.