Ray Morris writes:
That's a 70% reduction in bandwidth, time, disk io on the mirrors when they get CD #1 & #2 instead of the full DVD. Every user who is served by downloading only 2 CDs totalling 1.2 GB instead of 4 GB is good for the mirrors, good for the network, and good for the users. If they are forced to download the DVD instead, that means they use three times the resources that they currently do.
This calls for a CentOS-minimal.iso. ;-)