I'll admit that even though I've lived in the US twice, I can only answer two of the questions (the s'mores and tater tots ones)... but several of the rest are before my time (i.e. I do own some SNL DVDs, but they are of the Will Ferrell/Molly Shannon/Jimmy Fallon/Ana Gasteyer era).
They forgot to add...Ask them to pronounce Kansas and Arkansas....I tried that one on my fiance' and got a hilarious answer.
Lol - that's one I can answer, since my aunt has lived in Arkansas for the last 35 years and I've spent about 7 months in Little Rock over the last 20 years
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Embarrassingly, when I was in secondary school, I told my form tutor that I was spending my summer in Arkansas... but after I said it, I also pronounced it Arkan-SAS so that she would spell it correctly... and then she went and pronounced it incorrectly in front of the entire school year!