I hate to be a party pooper, but 300 metres is hardly considered tall these days. There are at least 70 buildings over 300m under construction right now worldwide, with about the same number of serious proposals as well. I have noticed a growing opinion on other boards that the new supertall standard should be 400m, or even taller -- 300m or 350m is nothing these days.
Without question, Toronto is clearly the most active city in Canada right now, but in terms of height it's equally clearly a second- or even third-rate city on a world scale. Even cities like Mumbai are climbing past Toronto in terms of tall buildings:
India Tower (125 floors, 720m)
World One (117 floors, 442m)
Shreepati Skies (81 floors)
Orchid Heights A (80 floors, 300m)
Orchid Heights B (80 floors, 300m)
Indiabulls Sky Forest (80 floors)
Minerva (77 floors)
Orchid Crown 1 (75 floors)
Orchid Crown 2 (75 floors)
Orchid Crown 3 (75 floors)
Indiabulls Sky Suites (75 floors)
Orchid Turf View A (70 Floors)
Orchid Turf View B (70 Floors)
Palais Royal (66 floors, 320m)
Oberoi Skyz 1 (65 floors, 230m)
Oberoi Skyz 2 (65 floors, 230m)
Indiabulls Sky Tower (64 floors)
Skylark Tower (60 floors, 300m)
Imperial 1 (60 floors, 249m)
Imperial 2 (60 floors, 249m)
Imperial 3 (60 floors, 249m)
Orbit Terraces (60 floors)
That's 22 buildings at least 60 storeys tall that are completed, under construction or seriously proposed. Toronto has 7. And Mumbai is far from unique, in fact it is typical of many Asian cities today. There are cities in China that I had never heard of before that have dozens of supertalls and near-supertalls planned or under construction. That number of very tall buildings would not be built for simple 'pride', they must be economically worthwhile in the eyes of the builders. In Canada, the banks' financial requirements are considerably more restrictive than elsewhere, so no truly tall buildings are being built -- even Aura and Trump are not tall by world standards. But yeah, if you're satisfied with 250m buildings instead of 450m, Toronto is okay.
The cautiousness and conservatism of Canadian banks can be a good thing -- that's why we weathered the global economic meltdown so well -- but it has definitely held us back in terms of building heights, compared to the rest of the world.