Most people in the US go to a specialty retailer if they need wine glasses, and a nice one has Riedel or something comparable. The sales associate will invariably say "oh this is made to enjoy red Bordeauxs, this one is for white Burgundies, etc, etc" and they will be nudged to go fancy. I don't know if they go in with the expressed plan to buy an enormous wine glass set, but just look at https://www.riedel.com/restaurant/collection/d/sommeliers/bo..., it's 30 oz. I think it's fair to say there is an element of industry pushing consumer demand in a more expensive direction. Also, I think it's fair to point out Riedel is European and has been around for 250 years.

Also, even if I was presented with that wine glass, I would expect nothing more than a standard pour. I don't think you're being entirely fair to Americans in this particular case (even if a number of them would be happy with a pint of wine).