I think you are on to something Doug as the ideal layout of a golf course, like a links course, is a narrow strip running along the water. That is the complete opposite of what you get in Quebec.
I also wonder if there are a couple of other issues to explain the lack of highly ranked courses in Quebec. Quebec has the second fewest courses per capita (behind only Newfoundland -
source), so perhaps golf isn't part of the French-Canadian culture as much as in English Canada. I know that there were a lot of Scots that settled in Montreal and Quebec City 100+ years ago but perhaps it just didn't take. I also wonder if more of the golf courses in Quebec from the Golden Era are NLE. I am a member at Scarboro which is the only remaining Tillinghast course in Canada. But Tillinghast designed at least two courses in Quebec - Anglo-American and Elm Ridge. Anglo-American is NLE and Elm Ridge is (apparently) mostly NLE with perhaps a few holes remaining as part of Dorval Municipal Golf Course.
Your club, Royal Montreal, also moved as recently as 1959 so the bones of your courses were built in what is considered the dark ages of GCA. Do you know anything about the previous course that existed in Dorval from 1896-1959? Perhaps if more of the courses built from 1910-1930 remained then there would be more highly thought of courses in Quebec?
It also seems to me that there hasn't been much construction in higher end courses in Quebec in the last 50 years, with the exception of resort courses at Mt Tremblant. Ontario has had an explosion of high end private courses during this period including The National, Devil's Pulpit, Devil's Paintbrush, Beacon Hall, Coppinwood, Goodwood, Redtail, Mad River, etc. And then there have been high end public CCFADs like Eagle's Nest, Angus Glen, Osprey Valley, Copper Creek, etc. Thirdly there were some wonderful courses built in Muskoka like Oviinbyrd, Rocky Crest, Bigwin, Muskoka Bay, Port Carling, Lake Joseph, Grandview, Deerhurst, etc.
And Ontario has more courses remaining from the Golden Age like Toronto, Hamilton, Mississauga, Scarboro, Weston, Summit, Westmount, St. Thomas, Essex, Cherry Hill, Rosedale, Brantford, etc and these were built by Thompson or the ODWGs from the US or UK like Ross, Park, Colt, Tillie, Travis, etc.