You didn't wait for the official release announcement ;)
Why should he? Is he only allowed to run yum update after each official announcement? I still see no release announcement yet, but packages are already available.
In turn, I can see the release announcement, but no packages :-(
A few more hours won't hurt me, but I'd be curious to know if I can force yum to use certain mirror that seem to be in sync. I'm located in Finland, and the two local mirros have ages of 1.8 and 1.9 days now: http://mirror-status.centos.org/ However, I can see plenty of other mirrors in nearby countries that are 3-4 hours old only.
-- TiN