Brett Hull isn't even relevant; he learned the basics of hockey in Chicago while his dad was a Blackhawk. He didn't leave town until around 8 or 10, and had played since 3 or 4. Can't say he was trained to an elite level, but it's the difference between a Ford made in Michigan and a Honda made in Ohio. One of them is considered an American car, one of them isn't. Why? Because one of them was designed in America by American engineers, while the other was designed in Japan by Japanese engineers.
You'll have to forgive me for not putting much stock into Hull's ~ four years of hockey education in a state that had produced exactly three NHL players by the time he moved away. You are right though that he is only tangentially related to the topic.
That's a useless stat when it come to determining the English community in Quebec, Many Anglophones here can speak french and that doesn't mean they are francophone or identify themselves as such.As an Anglo-Quebecer, I can tell you that the proportion of those who would consider themselves Anglophones or use English primarily is probably about 20% of Montreal.
Quebecers like Mike Bossy, Gump Worsley, Scott Mellanby, Roberto luongo, Mike Ribeiro are not French-Canadians.
If we are talking about ethnicity/mother tongue, technically they aren't French Canadians just like Joe Sakic, Nazem Kadri and many more aren't Anglo Canadians.
However, in a practical manner, I would consider Ribeiro and Luongo as Francophones because they speak French perfectly and it's probably the language they are most comfortable with.