Oops, so you did! I found yours and have deleted mine. I had searched "A-Z" and wrote this after nothing came up for capitals - maybe you could add an A-Z reference in your title? It's interesting seeing the differences in the answer %'s - generally they're the same at the top end, but for some reason Freetown is the bottom of your quiz at 20% but 33% on mine; and Guatemala City (17% on mine) is 34% on yours. Maybe that's just the result of small samples, since only dozens have done each so far.
Whoops! I've done a similar thing to jerry, not looked up the right thing! I'll keep mine however and wait to see if either one gets featured or something.