>Some network operators do funny things, so a client can actually get higher transfer performance by connecting multiple times and transferring parts of the data in several simultaneous connections.

Actually there is a FF extension call downthemall that multithreads HTTP downloads which will infact max out your inbound speed just like torrents do. As far as router are concerned if you set a particular device with a higher QOS then the one that is torrenting you should not have the problem.