I keep reading too much from the unwashed masses about how this throttling works. ("They see the process that does P2P and throttle anything coming from the sam

I keep reading too much from the unwashed masses about how this throttling works. ("They see the process that does P2P and throttle anything coming from the same process." - I do not and will never install ISP software on my systems.) Since the ISPs are not forthcoming with that information, could someone do an excellent writeup on the different throttling methods and then provide a left-field guess as to what these "access providers" are doing?