Torrents are a little more complex. Sometimes there's not many seeders online, perhaps only partial file holders so speeds can vary greatly. I found torrent speeds tend to vary over a 24 hour day, or even some days of the week depending on who was online. Also some of those with the file you are after might be sharing most of their upload bandwidth with 'other' files at that particular time.

Another main issue which unfortunately LW does not inform you about is about Share Ratio. For those who use 'other' full-purpose torrent programs, they sometimes have their settings set so people with less than a particular Share ratio cannot upload from them.