Your torrent client has little to do with the download speed. More influential variables would be the bandwidth speed, number of seeder and leechers on each specific torrent, and the number of simultaneous torrents downloading/uploading.
@the100thmonkey I think you forgot to mention how to run that test. Like many people, I use Speedtest
You are correct that you don’t want to use all of your U/L bandwidth for torrenting, especially not if there are other computers on your internet connection, and that upload speeds are often about 1/10 your download speed.