I read on distroowatch that the packages are uploaded as they are built so that answers one of the questions here.
I also found a mirror (think it is at princeton) that is only partial. Maybe it's abandoned? A mirror that says it's unofficial at mirror.frgl.pl
The gatech mirror is often slow or unresponsive. Clarkson no longer has rsync for void even though it says it does.
gentoo-portage Gentoo Portage
gnu GNU Software
tdf The Document Foundation
This site has an interesting software mirror interface that shows the status of the different mirrored repos/distros.