I recognize that you (while wearing the administrative hat) have an obligation to wait for an official statement. However, for those not in a para-official capacity, it's a worthwhile topic to discuss, as billing a customer for a repair that ought to be free and ought to be covered under a proactive service bulletin is, in my opinion, a rather poor way to treat customers. I say this having replaced the transmission on my Ford Excursion with only 45k miles due to the failure of a plastic part; failure of that part was covered under warranty if the vehicle had a gas engine, but Ford felt the lower RPM of the diesel prevented the part from failing. Imagine the coincidence when a friend's diesel Ford Excursion failed the same part at 45k...
With lots and lots of due respect, one negative sampling does not make the issue 'isolated'.