[CentOS] cloning a server

>You can have kickststart run a "yum update" so each box will have the
>latest updates as at install time.

Over and over again I see this reco and it makes no sense? If you have
access to updates whether they be yours locally cached or remote, you
should add a repo line in your ks and "install" updates from the start.
It's faster/cleaner and just plain simpler, yeah?