Surely they could use some kind of QoS to make torrent traffic the lowest priority. Since they control the clients too (and don't have to worry about hostile cl

Surely they could use some kind of QoS to make torrent traffic the lowest priority. Since they control the clients too (and don't have to worry about hostile clients trying to subvert your traffic shaping schemes) they can also set connection limits to keep each client from opening excessive numbers of connections. In short, it's not like dealing with bittorrent in the wild, where every client is trying to leech at max speed with no regard for the rest of the network. They control both ends of the process, so they can tune it.