I have dual citizenship, both Canadian and US (naturalized Canadian and born in the US), and frequently cross at one of the "sleepy" border crossings as well.

When I get to the Canadian border, once they realize I'm Canadian, everything changes. It's a very friendly, warm greeting like a couple of old buddies that are heading out for a beer. My American wife, who's watched this a ridiculous number of times is just blown away by how I'm treated.

However, at the US border, while not always bad, I have run into several border agents that have been pure assholes. I've been detained and searched a number of times and have always been polite to a fault - I'm as white as the driven snow and have never broken a law, or been arrested. But you would think I'm flagged as a suspected drug runner or potential terrorist sympathizer. Sadly, it's simply not a stereotype.