"We were going to have some servers with mirrors of the
repositories of the major distributions. Unfortunately the mirrors
weren't up till a couple of hours later which meant that the first
installations that went through had to download stuff from internet
repositories.... and with so many installations going on at once,
you can guess how fast that went through. Unfortunately not having
the mirrors from the start could have easily added 20 minutes
(being optimistic) to the installation times of that first round.
For my second installation the mirrors were already in place and
that went much faster.
"The thing to keep in mind for every installation you do is
trying to get it well done in as short amount of time as possible,
and having the "customer" understand the basic things (most
important of all: package manager). That can be a little tricky to