[Mac Teefürzweifix]

I can only report my personal experience. My own USATT rating was in the 1500 to 1520 range, whereas in Germany I generally fit into the "Bezirksklasse" or "Bezirksliga" (depending on how it's named in the various states).
A guy I used to know in the USA was rated around 2400, and he was one of the top players in the "Oberliga" over here.

So that's two data points, not statistically valid, but enough to extrapolate from and get yourself into trouble :-)