Yeah I played around with it more, in the middle of the night (when the internet is significantly faster here in China) -- no luck. Analyzing the server is just not what I need to do, and takes too long and seems like overkill for what I need to do. (I don't really need to check any files on the server, I already know my files are the newest copies).
If anyone knows of a way in YummyFTP, or actually, any Mac FTP client that can do this:
Only upload X modified in the last X minutes -- example: Take all PHP, SWF, CSS, HTM, HTML files modified in the last 5 minutes, only upload those
It would greatly increase my productivity. Thanks again for your continued help.