Vancouver: where senior developers would be genuinely lucky to top out at $90k, a single bedroom on a transit line is $800k, a teardown in a distant suburb is $1.5M, and bottom shelf cheese costs $40/lb.
I don't think a startup scene in a city is ever going to really blow up when sticking around in that city is giving up the possibility of building any kind of future for yourself.
Everybody I know who's worth half a damn moved to Seattle.
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Toronto: maybe.
Montreal: sure.
The prairies: "Is Fargo the next up-and-coming startup center?"