Canadian Native, being a central Canadian I can attest that Canadian raising is common here. An easy way to tell if you have Canadian raising in your dialect is to try saying 'house' as a noun and a verb (eg. I will house the dog in my new house). Also try pairs like knife/knives and lout/loud.

If you pronounce these pairs of words differently then you have Canadian raising and others might hear something like 'boot' or 'boat' when you say 'about'.

In fact, the wikipedia article on Canadian English suggests that Canadian raising is common in Western and Central Canada and is rarer in the Maritimes.

http://en.wikipedia.org/wiki/Canadian_raising