A few years back--in Medora, ND of all places--I met a young lady working in a motel who was bilingual. One parent French, the other American. Lived in France until she was a teenager, at which time her father's job took them to Quebec. She told me that it took her some time to catch much of what her schoolmates said, when they were speaking at a normal speed.
I took high school French students to Quebec on a couple of occasions, spent about a week there. The disturbing thing to me was that when I came home, I'd hear a bit of the Quebecois accent in my own French.
