I think you can safely say that is "traffic shaping" or actually, this sounds like packet insertion. Comcast does this. They insert FIN packets into your stream which makes the host think that the client has terminated the connection and the stream is dropped. It's really %^#$^^ stupid because then you just reopen the connection and try again from the start, using more bandwidth.
Obviously, their concern is not bandwidth usage, but file sharing, which conflicts with their own content services.
