Hi, I'll be so glad to see next (or one of the next) version of the apt package, to have PARALLELISM.
For example if I have more than one row pointing to one stage (stable testing or unstable) in /etc/apt/sources.list, apt to get one packet from one server, and at the same time to get second packet from the second server.
Now apt from unstable match the fist server and began to download all packets from that server.
deb http://ftp.en.debian.org/debian main stable contrib non-free
deb http://ftp.de.debian.org/debian main stable contrib non-free
in this case the stable packages will be ONLY downloaded from first server from the list ...