Gee, the Luftwaffe flies a dinky 737 between EWR and FRA. How in the world do they manage to get any customers to fly on such a tiny airplane?
Oh, and a Gulfstream G500 is an even smaller airplane than the 757 and 737, and people fly in these across the Atlantic.
Also, the upper deck on a 747 is rather small, but most airlines use it as a business class cabin.
The point is, what does the size of the aircraft have to do with anything?
I think he was referring mainly to the BE seats not being as nice as those on the B767 and B777 a/c.