Bell Sympatico, Canada's largest Internet Service Provider (ISP) has admitted in November 2007 that it "purposely" slows down its high-speed DSL, especially for torrents. This is despite them not telling customers. This video is a customers story.
While it's true that Bell throttles and it sucks, The contents of that video are still a bit misleading. (Well let's be fair and assume the creator didn't fully understand the technology...)
First, 16Mbps isn't 16 Megabytes per second, it's 16 megabits per second, that's 8 times slower, or about 2 Megabytes per second.
Second, because of overhead and misconfigurations on the average PC, you could never get the full amount for payload. Yes, Bell isn't clear on that, but neither is any other ISP, and it's largely out of their control.
Third, the downloads that he shows at 14Kbps and 309KBps could be caused by slow/full links at the site, or any other ISP along the way, outside of Bell's network.
In other words, although Bell may be dishonest in its advertising, these anecdotal tests don't prove it...