I think the urge to go is greater than any vanity issues.
The Phenom is a better solution without a doubt but on short VLJ sectors the toilet is seldom required.
It's interesting you mention high-end clientèle as we have had some really high end ones use the loo without giving it a second though. At the end of the day they are human just like the rest of us.
It's also very interesting that the high-end clientèle are using our cheap little Mustangs - sign of the times I guess.