Isn't testing with a bunch of small files a different scenario since BTsync probably isn't breaking those files up into separate segments/blocks/pieces since they're so small? I know that when I have a folder with 75 zip files, each around 50MB, the slow/fast pattern occurs. Could this be an ISP throttling issue? I'm pretty sure I noticed the same pattern when I setup a private bittorrent tracker to share a file between my two windows computers. If so, how do I get around it? I need to do some more testing and report back. Also from what I noticed, BTSync will not download more than one file per folder. If I add one new folder with 50 files it will only sync one file at a time. If I add two or more folders then BTSync will download multiple files at the same time but still only one file per folder.