Average house in Toronto or Vancouver costs about the same as in the valley. Senior devs rarely make more then 100-110k USD. No wonder people, myself included, at least consider moving.
I don't think that's accurate. I was just in Vancouver last week and took a peek at the real estate listings. I could sell my 1734 sq ft house here in the Bay Area, get one twice as big in Vancouver, and still have quite a lot left over.