When an older iso is installed, sometimes ibiblio is marked as the main repo server.
After first update, or manually select and install/update apt-sources-list from Synaptic, the sources list will be updated and ibiblio is no longer on this list.
The new 2013 iso's have already abandoned ibiblio in the package manager.
Evenso, ibiblio is no longer the main repo server, nluug it is

(I believe)
For me nluug is the fastest, but hey, I'm a Dutch PCLos user

Rsync help:
rsync -avz -P --stats --delete-after \ftp.nluug.nl::pclinuxos/. \/media/YourDisk/PCLinuxOS/ Where "\/media/YourDisk/PCLinuxOS/" is your download map.
In this setup you get the complete repo including iso's, LibreOffice offline installer and much more, 88.4G
So, do not forget to use the exclude option or specify "\ftp.nluug.nl::pclinuxos/." to the maps you really need.
Ed