Watcher doesn't use multiple connections for a transfer job with multiple files, whereas Yummy FTP itself does (and probably LFTP too) but then Watcher isn't really just a client, it's an automated transfer agent. If you're seeing this difference with a single large file that would be a different matter - is that the case? If so, please test the same with Yummy FTP and any other FTP client for Mac to see what speeds are reported.