@Peyton
"...Most Americans can definitely tell the difference..."
I think the best was in a hotel in Cincinnati, when my friend and I were stopped by several members of the local "Caledonian Society" because of the Scottish t-shirts we were wearing. One of them told the others that it was 5 years since he'd last been in Glasgow and it was so nice to hear a real Scottish accent accent again - pointing to the dual nationality Dutch/German guy with me...
As an Englishman, I've been assumed to be French, Kiwi, Irish (even more remarkably I was in Boston at the time) and, far too often to count, Aussie. So no, most Americans can definitely NOT tell the difference.
Paris has been outside the US, so she might be able to tell the difference...