I have just changed from BitLord to uTorrent, the main reason being the ability to encrypt torrent data. When using BitLord I would be lucky to reach a 100kB/s d/l rate on a well seeded torrent, the average would be 30-40kB/s. Since changing to uTorrent with encryption enabled I have been hitting d/l speeds of 400kB/s+ with averages of 175-225kB/s.

Encryption stops the ISP's from limiting the torrent communication speeds as the data is encrypted and their filters do not notice this as torrent data.

Also I like the ability to be able to schedule limited u/l and d/l periods during the daytime when my network is used more heavily, but then automatically open up the limits during the night time..