@ehBeth,
As I was writing that, I wondered if you might toss in some local perspective (and I have a dim recollection we might have spoken about this years ago). I think some myth/foundational stories are inevitable (such stories exist regarding my home town and the Fraser River Valley, for example).
But it is significant that such stories as you reference did not travel nation-wide or even close to that. Also, would you agree that in this respect Canada and the US have marked differences?
PS... when you get a chance, Gopnik's piece is very interesting.