Besides the fact that I think the demographics of people that have seen it, (I mean the age they were when they saw, not the age they are now) are at least as much above 20 as below. (now if your argument was, im not 10 yet, or I am over 75 or something, ok, those ages have been less exposed to it)
Plus people have made an existing sport out of it nowadays ( no flying necesarry...) and even so, it doesnt say in the quiz that fictional sports are excluded.
(I think it might be the same people that throw a fit when a unicorn is called an animal. Because it is fictional according to their logic it can't be an animal (yet they never say that about dragons...) well, humans in books arent humans then either, because they are made up for the story aswell, eventhough there are real versions of humans)