Deluge
So it seems like the "next announce" time depends on the size of the torrent - I got half an hour for a 3GB torrent and two hours for some ~200MB torrents. Can I change this? This morning, I had to keep spamming the update tracker button to keep the speed up - but if the interval could be changed, I wouldn't have to do this.
Also, can there be a preference to say no auto-updates if the download speed is over X KB/s, because it's useless updating the tracker when the download is already fast.