I think it would bother the pilots involved MJ. But then again the FAA have a far more practical approach and wouldn't require an unworkable transition of 14 written exams and expensive flight tests, which couldn't be undertook whilst currently employed due to length of time it would take to pass the said conversion process.
The end result of all of this in Europe is that the Pilot is flying the same aircraft with a big 'N' on the tail, no differently than he/she has done before. We are not going to accept a conversion such as this due to the many many years of precedent already set.