I have the same Torrent speed problem. It's just unacceptably slow in comparation with utorrent in my PCs from which I get full bandwidth speed (1,2 mb/s). plus it craches more often and wont resume downloading stoped files, so i have to delete everything and start from scratch after rebooting the drive and router as well.
I'm waiting for a FW updated adressing this issue. And maybe someone could inform us about a reliable/open port for this torrent client (which I ignore).
Untill then, I'm still in favor of a good dedicated NAS for this task and others as well. As this feature could dramaticaly slow down this router.
Regards.