I'm pleasantly surprised by the number of people in Chicago who—upon asking where I'm from —know roughly where the Quad Cities are.
To put in perspective how small the QC is in comparison to Chicagoland, the most recent Census estimates put the Chicagoland area at 9,923,358, and the Quad Cities area at about 1/20th of that: 474,385 humans. (I say "humans" because "residents" would mislead some into thinking that it included both humans and dogs—but, alas, the Census people do not mail their questionnaires to our puppers and therefore sadly discount this vital demographic of the citizenry.)
Put another, more pretty and "Ooh! Ahh!" way, take a look at how much brighter Chicagoland is from space than the QC:
Then again, I'm not so surprised by all the people who know where the QC is, since those who've asked me have mostly been my coworkers. People in public radio—some of the smartest bunch out there.