my two cents. I took a couple of French classes in Canada and I can vouch that those guys don't mess around; they are like French vocab nazis :-P so it's always "la fin de la semaine" and "courriel electronique". In contrast, one of my friends is "French" French. She got no issues saying "le weekend" or "e-mail."
When the French lost to the british in 177x-ish, people of Quebec were left to fend for themselves. They fought tooth and nail to preserve their culture and language and I think to this day there's still this inertia going on in the way modern French Canadians think.
Moreover, there has been a study/survey showing that isolated culturally homogeneous communities tend to heavy-handedly police (the US style) the use of their native languages. I wish I could find a link to that study :-(
As a native russian speaker living in the US i can actually confirm that the study seems to ring true; i dislike (very much so) when russian speakers start mixing in english words.