Toronto's 28km subway expansion by 2020 {let's face it Sheppard isn't going anywhere without huge government money which it won't get from either Ottawa or Queen's Park}.
No, Sheppard isn't going anywhere which is why I didn't include it. Spadina is 8km and Eglinton is about 20km of new line (plus 5km of substantially upgraded line).
The GO expansions are great but in reality do little for Torontonians themselves as they will not pay the large extra fares, even 10 minute service is not good enough, and they are essentially for 9 to 5 commuters.
I'm confused. Paris, is extremely small, so small that even La Defense is NOT a part of Paris. Paris is getting very little Metro over the next 15 years. Not too different than Vancouver in that regard (what 5km of Metro over the last 25 years built in the Municipality of Vancouver?).
Either service in suburbs is useful or not. Residents of York/Durham/Peel regions are every bit as much residents of Toronto as the folks in La Defense are residents of Paris; and the expansion in those areas will be very useful to the residents of the Toronto area and the Toronto economic zone. GO expansion has a direct and positive impact on downtown.
To believe that 905 areas (or 705 and 519 at this point) are not part of Toronto doesn't reflect the populous here. It's no different than Queens being a part of New York, than La Defense being a part of Paris, than Burnaby being a part of Vancouver, or than Oakland being a part of San Francisco.
Incidentally, Sydney would be very surprised if you told them they didn't have a useful Metro and a good chunk of Germany would swat you if you told them the S-Bahn was useless to urban residents.
Washington DC and San Francisco would also be surprised to hear that 10 to 15 minute frequencies disqualify them from having a Metro. Montreal would have been surprised too not all that long ago.
FYI, LakeShore West already runs ~10 minute frequencies (scattered; 11 trains between 4pm and 6pm). Electrification would be to bring this down under 5. The 10 to 15 minute number I quoted was off-peak service; very common within North American metros including New York, Chicago, and Los Angeles in addition to those mentioned above.