Ummm. Asking a question here. What does the Patriot Act have to do with anything?
The difference being you'd need to go to court to get a warrant, and I believe there would be a legal opportunity to be notified of this. If Canadian law enforcement accessed your data, you could legally know about it.
The Patriot Act basically says they can demand it, with very little legal support, and it is against the law to tell someone that their data has been accessed from your servers under this request.
So, it comes down to the US having granted themselves access to any and all data from a US owned company or US hosted server ... and made it illegal to disclose that access has happened.
If that data access comes under the guise of secrecy and not going through the normal courts, you'll never know it happened.
As I said, those provisions of the Patriot Act give access that concerns a lot of people ... see here.
So, based on what I've read, and what I've been told by corporate policies ... for anybody who isn't in the US, America and American owned companies are completely untrustworthy since the law reads like it bypasses local laws when it comes to data security and privacy.
Now, for a bit of balance the other way, I see that people are starting to say the Patriot Act isn't so intrusive and this is all blown out of proportion.
But, until I see company and legal policies changing here in Canada, I will continue to treat data being put into a US server as a stupid idea, and I will continue to treat those entities as hostile and not trustworthy.
Since I'm not a lawyer, and I don't have anything to gain by suddenly trusting these entities, if I stick with this, I'm in compliance with company policy. I'll just err on the side of caution -- not trusting the US government is just a bonus at this point.