According to Torrentfreak Rogers is throttling Bittorrent traffic. He suggests a solution: encrypting :

“Currently both Azureus and µTorrent included this new form of encryption (specs) in their latest Beta’s. The fact that these two clients are actively working together to implement this new feature is promising and will make this form of encryption the new standard since the users of these two clients cover the majority of all Bittorrent users.

There are two “encryption modes” available.

The 2 different payload encryption methods plaintext transmission and RC4 provide a different degree of protocol obfuscation, security and speed. Where the plaintext mode only provides basic anti-shaping obscurity, no security and low CPU usage the RC4 encryption obfuscates the entire stream and not only the header and adds some cryptographic security at the price of spent CPU cycles.”

Good to know.