[jonahrd]

I know this is super late and nobody will likely see it, but the population of Quebec + Ottawa together is 18% of the population of Montreal + Toronto.

And the amount of track to connect the 4 cities together is double the simple Montreal-Toronto route -- on paper. In reality it's much larger, because most of the track along the Montreal-Toronto corridor is useable for HSR, but the proposed Ottawa-Toronto stretch is the one that needs a lot of new track.

There already are trains connecting to all of these cities, so HSR would still benefit people trying to get from, say, Toronto to Quebec City (the current rail service has a ~30 min stop in Montreal anyway, a transfer wouldn't add any real delay in that respect, and you'd cut down several hours of the journey with HSR service for the first leg). I'm simply saying that it would be great to just lay the damn track for HSR between the two largest Canadian cities, and deal with the smaller ones down the road.