For me, it was quite the other way around. I never knew that there existed doughnuts without holes until I went to the UK a few years ago. And cream or jam fillings were unheard of! But I ascribed this culinary quirk to the well-known British dottiness (doughtiness?? nuttiness??). Now I see that it all goes much much deeper... :-)

FWIW, as far as Spanish people are concerned, if it ain't got a hole, it ain't a "donut"! A bun, maybe...

Marianna