Port forwward + encryption + Peer Guardian= Perfect torrent download..
If it doesnt work then see if the normal download downloads at full speed, and tell us the speed, It might be a problem of a faulty line..
All the talk abt blocking packets is BS, because, Torrents are as it is hard to block, when u enable encryption, it becomes fool proof, They cant afford methods to block them ,on such a large scale.
Also check if there is a green icon in utorrent in the status bar below..
Are the music and movie torrents from the same source??
U can try torrents from the bay top 100 for trial...Will show the best results..