The point is that knowing that Zurich is in Switzerland is more similar to knowing that Denver is in Colorado than it is to knowing that Denver is in the United States. Presumably the size of the city is interesting because the implicit assumption is that knowing where Zurich is important because Zurich is a big city.
My point is that it isn't similar at all, on any level.
A typical foreigner to the US probably knows where some large cities in US are without having the slightest clue about which state many of them reside in.
...Which is why it's so similar to how a typical American probably knows where some large cities in Europe are without having the slightest clue about which country many of them reside in.
I'd say that few outside of America could write that sentence.
The difference between two neighbouring countries is a huge deal and apparent (regardless if you are a local or not) where you don't even speak the same language, have the same currency (the euro has of course changed that a bit (in Europe)) and for all practical purposes a complete different sets of laws and culture.
The reason for why many cities are notable is because they are the capitals of different countries. Their identity is based on their country. You can hardly say the same about different states in America (to the same extent (of course people that live in America have different accents and prejudices for people in other states etc., but to compare that to different countries?)).
I think we're both wrong to a certain extent - you're de-emphasizing the differences between states in America too much, and I'm overemphasizing them. You believe that countries are different enough culturally that not knowing which culture a city is part of is ridiculous, I believe that states are different enough geographically that not knowing which geographic area a city is equivalently ridiculous. It's a pretty dumb argument.
In America I don't need to travel at all to hear many different languages, experience different cultures, etc. They're all in walking distance in any major city. European mono-cultures need to make nationalistic distinctions, the American multi-culture doesn't.
America's monoculture was actually one of my surprises. I live in London; going to the Bay Area and seeing the monoculture was a bit of a shock. IMO you're far more likely to hear foreign languages (foreign to the country) in Europe than almost anywhere in the US.
To paraphrase Richard Feynman: you're not right; in fact, you're not even wrong.
No I don't find Swedish cities interesting. But I did not start quizzing you about U.S. cities. If you started quizzing me about Swedish cities, then it would be fair for me to quiz you about American ones. The issue of cities is irrelevant; the concept at discussion is "turnabout is fair play." The guy who asked about Zurich wanted to show how stupid Americans were by trumpeting his culturally specific, regionally biased knowledge. To show how this was just snobbery, an American did the same to him. It doesn't matter if you don't think America is interesting; that's not what this is about.
Note: I actually like Europe; I'm just trying to prove a point.