I work in ISP and the biggest problem (and the reason) why P2P traffic is throttled, is the network abuse from the P2P programs side. If you are in Sweden and calling your neigbour you can expect low rate for the call. If you call Argentina, price is high, because traffic must pass Atlantic and many borders. Each byte that crossed Atlantic is many times more costly than the byte that is delivered to neighbour. Costly for you, users, because YOU pay for that cost, not anyone else. Megabit of traffic costs thousands in long distance and for some special destinations, and cost nearly zero in short distance or some other destinations. Both eMule and torrent clients are STUPID enough to do not care about that at all, happily downloading a 4MB torrent file piece from Argentina even when the source is available nearby.

Whats needed is the priority based on IP ranges. So, if many sources are available, client must connect from first priority IP ranges, then from second priority IP ranges, and so on. Its so simple to implement, compared to uTP. And the IP list file with priorities for every IP range, very similar format of IPFILTER.DAT in emule, will be prepared by ISP. The client can get the file by connecting to, for example _ip_priorities.reversednsname.provicer.com. I will post this to utorrent forum and see what happens. If they implement this, I will advice all millions of clients to use uTorrent only, on every invoice, for example. As an ISP I want to deliver the maximum possible speed for the interconnect budget I have, and IP priorities would allow to eliminate all throttling. Its the most popular files that kill the networks, not the rear files. And most popular files are usually offered locally, just the programs are stupid enough and connect to South America to get piece that is available nearby.