mbneto wrote: ...
The faq from the centos.org site mentions something like 72 hrs (or less) from one security update to goes from the sources.rpm from rh to centos.
CentOS is made, for free, by a group of volunteers. They generously donate their time, their computers and their bandwidth to the community at large, for which I profusely thank them.
If you need the top service of RedHat, which I also thank for not only developing a great product but making possible to have CentOS and others, then you can subscribe to RedHat carpet service.