Yes, the "OU" diphthong in some parts of Canada differs widely from the way it is pronounced in most parts of the USA, but I don't find it universal, having traveled from Nova Scotia to British Columbia. I find it more pronounced in some areas, less in others, more in the Ontario-and west provinces, than elsewhere. I have noted another feature, which descends down into the Dakota's and Minnesota of the US area, a distinct inflection in sentences, particularly questions, or invitations for affirmation, which end in "eh?" in Canada and "yeah?" in the states. Anybody else see that? I can tell when I, (an American from around Boston), am talking to someone from the Dakota's, or from N. Minnesota or N. Wisconsin or even N. Michigan...they can almost be mistaken for Canadians... not that there's anything WRONG with that!! I'm fascinated by accents of the English language in the US and Canada, and love learning about (a-boait) how these various accents came about. And, maybe I'm not the best ear, at my older age, to distinguish all those variances. Heck, I have a hard time telling some British accents from some Australian accents, just saying.

Anyway, do others find the way some Canadians deal with the up and down inflections in their sentences something worth exploring? It's definitely different from most Americans' way of asking questions, at least for those in the middle of Canada it is, much more British or even French, if you ask me.