This article is four pages long so for a change I wont add a fistful of quotes
http://arstechnica.com/articles/culture/Deep-packet-inspection-meets-net-neutrality.arsArs recently had the chance to talk with executives from DPI vendors Ellacoya and Procera Networks about their offerings and how they are already being deployed around the world, and we got a look at the newest boxes on offer from each company. Their top-of-the-line products can set you back several hundred thousand dollars, but some of them can inspect and shape every single packet—in real time—for nearly a million simultaneous connections while handling 10-gigabit Ethernet speeds and above.
The writer of this article makes a habit of repeating the claims of those companies suppling throttling or "Deep Packet Inspection" (DPI) equipment perhaps in the hope we may believe their claims of how effectively it operates, I think most winmx users are fully aware of what it does.
Can I suggest you all take a read of this because its simply common sense to me that we gather as much intelligence on anti P2P systems as we can and become familiar with the problems they cause when abused by a "dirty tricks" ISP company, of which unfortunately there are an increasing number.