I'm in Toronto, I've been blacked out from when it started to sometime during the night when it came back on. So, about 10 or 12 hours I'de say, without power.
From what I hear there was about 40 million people with no power, 2/3 in the uS and 1/3 in Canada.
There wasn't looting or anything over here, it was just dark. And the building beside us had a fire (barbecue) so the fire-crew showed up and that was a bit of excitement.
Yesterday during the dusk hours, there were reports of certain parts of Ontario getting their power back, even some close to where I live. I guess those were the streets with the hosptials and banks and such. As far as I know, we got power back during the night, but its all good.
The US in blaming Canada, Canada is blaming the US and so forth. I'm suprised its all so interconnected, I would have never thought that Toronto's power grid would be connected to New York or Detroit.