It's hit and miss I find.
My American/Canadian friends generally get the concept, albeit have no experience ever using/visiting one.
My friends in Colombia understand it because of what happens in VZ and the spill over media, but it's pretty
economically liberal there.
My EU friends get it more than the American/Canadian friends because of the multi currencies that existed
before the Euro.
Some friends who understand it still are shocked that you can't get USD out of an ATM, let alone not walking
in to a bank/currency exchange house.
It's more based on who has travelled, not their nationality.
Regardless, it sure is nice to see the choices of currency I can take out of the atm: GBP/EUR/USD/CAD
And, as always, anywhere on Earth, channelling Biggie/Puff Daddy/Lil' Kim,
It's all about the Benjamins