I don't, not specifically. They've certainly been empowered since the passage of the U.S. Patriot Act.
I think the question is whether the government wants to make this easy for the U.S. government or make it difficult--that is, whether or not it wants to send PNR data to the United States with our direct blessing for them to use this commercial information for security purposes. We don't have to say it's nefarious; we only have to admit that their security culture is different from Canada's, as the case of Maher Arar attests, right?