I, for one, haven't seen much in the way of commentary about this. But it is worth remembering that the much-praised Blackhawk was originally nicknamed the Crashhawk due to many developmental problems. The Apache, which was supposed to be highly survivable, has also turned out to be something more and something less than promised. We may not "really" know how the Osprey does until it comes under actual fire in an actual combat zone. At one time the UH-1 was even deemed too fragile to survive ground fire.

Much of it may also end up boiling down to doctrine. The USMC sees the Osprey as a medium lift vehicle, which means it may not end up in the same sort of situations that the UH-60 does. The AF, on the other hand, is looking at the Osprey as a SAR platform, which means it will possibly come under much heavier fire than the UH-60.