Yeah, no, I don't think so either. It did feel like it would cause a similar groaning reaction, though.
My guess is that it's about Brits tending to stick "u's" in places where Americans don't (like "colour" or "favour").
My guess is that it's about Yanks tending to remove "u's" in places where Britons don't (like "colour" or "favour").
One, two, three four - listen to my botty roar! Five, six, seven eight - now we should evacuate!