I ran into a guy who had 3 yr old f650 that he had just finished the 600miles for a break in tuneup. The guy was unapologetic, said it was his toy that he only plays with when he feels like it. He probably fit the demographic of a BMW car owner (to resurrect an old word, Yuppie), and I have found many people think the cars and bikes are ridin/drivin by the same people.
I know a lot of high mileage HD guys who can hang w/ the best of them on a long ride. I guess it all depends on the individual.
I just sold mt 00RT to a guy who seems to have no plans to ride it on any long rides or even commute on it. I stil dont know why he bought the bike, but his money was green so he can do what he wants w/ it.
The seat guy formed his opinion a long time ago, but almost everyone I tell that I have a BMW knows that their built to ride coast to coast and back