@snood,
There are still some differences I'm unaware of until I hear Americans talking. I know what they mean, but something doesn't sound right, and I have to think what we'd say.
Some everyone knows, like pavement/sidewalk, postman/mailman, but others come right out of the blue like when I heard Bart Simpson referring to Black Forest cake. We call it Black Forest gateau, still the same cake though, (probably.)