This meme stereotype is over done in modern times. Modern US cuisine is fantastic and not missing any of the spice. We'll keep up with our eastern friends all day long.
It's not needed anymore (they used to have a advantage in terms of live expectency) but I do think a tradition, especially one surounding food/taste remains relevant under the general population for a very long time and I don't see any western countries with more sharp food even today but I could be wrong.