I think it is just the prejudice about how "easy" things that we already know seem. But I do remember, and have seen many people, struggling to get a grasp of IPv4 subnetting, routing, security, etc. But you practice and over time it becomes second nature. If you put in half the amount of effort into IPv6 that you did when you learned IPv4 you'd probably be set.
While I am really looking forward to IPv6, I am slightly dissapointed about global addresses. Granted, globally routable adresses is the main (only) thing that is getting me exited for IPv6, but there is something nice about being able to go into a new network and only need to remember "2.10" for an IP address. (Espessial when all the IPs I care about are set to the low "0.x").
