How does your ISP rate when it comes to throttling BitTorrent traffic? In the U.S., the worst ISP came in at 6%, but that pales in comparison to the 80% Canadians are experiencing. New data published by the Google-backed Measurement Lab gives a unique insight into the BitTorrent throttling practices of ISPs all over the world. In the U.S. and Australia most large ISPs limit less than 10 percent of BitTorrent transfers. In the UK and Canada on the other hand, some providers interfere with up to three-quarters of all BitTorrent traffic.