Some loose thoughts, stream of consciousness...
Oddly enough, you pretty much perfectly encapsulated my thoughts on the topic. OMG.
I think you make some good points, but I never understood this one. There were always going to be 1,200 Signature cars, and the Canada / US market has always been pretty close to interchangeable anyway. I'm pretty sure at least one US Sig ended up registered in Canada. Are you saying that just the Canadians should have received cars with > 1,000 VINs?
Yes, there's a fellow by the name of Harry who lives in Eastern Canada and has an American Sig. He has dual citizenship and both a Canadian and US address. He picked up his car in the US in the fall, and immediately drove it to Canada. He really was, to my knowledge, the first Canadian owner. (I still claim bragging rights for the first delivery in Canada, though!)