you have a local problem on your end or a mis configured bittorrent client - look at this :
at time of release, the DVD torrents were seeding ( for x86_64, i386 and ia64 together ) at over 1.3 GiB/sec.
its only grown from there. And almost everyone who's commented on it - has said that they have been able to saturate their links with the torrent ( eg. one guy on irc was leeching at 35MiB/sec earlier in the day today ... )
I find it hard to believe that in general terms, ftp would offer much better performance.
I do believe that something is wrong with the setup. I get torrent connection speeds that vary wildly from 10KB/sec to about 200KB/sec. FTP gets me about 1380KB/sec.
Jack