In the US its not as clear cut - when I used it in Texas & MidWest US they thought I actually meant two. The East and West coast were more flexible and used it as the Canadians/the British.
I am also from Canada, with Scottish and English roots at the grandfather level, and we all agree that a "few" people can't get married to each other in any of the three countries. We also agree that if you say that you'll be back in a couple of minutes, you better not come back in 4 or 5 minutes, or we'll finish your beer on ya.
"Improper" use is rampant, but the correct use hasn't changed. That's the bottom line. Bottom line post-script: most people don't think enough about what they want to say before they say it.