I believe there's an error in Joel's article. I believe it should say, 4Mbps upload speed or Target bitrate, the wording we received from Facebook. I think the published specs from Facebook are a bit ambiguous, but I think that the upload speed is more important.
Yes, my upload speed is much slower than 4Mbps. You can help by providing higher-res screenshots for this documentation. Actually, anyone from the community can help. If someone wants to put a better screenshot in this thread, I can update the HowTo guide with their screenshot.
This one is fuzzy due to bandwidth problems on my side.