>>Oddly, the Québecois can readily understand the French but the opposite is not always the case – thus their assertions that we are speaking the language incorrectly (grrrr!!)

I think we discussed something similar a while ago. I was trying to find charitable reasons why the French never seem to be able to understand other people speaking (or attempting to speak) their language - we didn't discover any!<

Surely this is just the Francophone equivalent of US English as an international standard?