I don't get it. Reading this line from the FAQ
"No,
CentOS releases will follow shortly after the release of Red
Hat Enterprise Linux source. "
leads
me to believe that CentOS will be largely usable as it has
been, as a free, completely compatible version of RHEL. Yes,
with challenges in errata availability, but that's the use
case.
Suggesting that CentOS is going to be *upstream* of RHEL
suggests several other valuable, but completely different, uses.
I'm not sure this is a great move, as I see bigger challenges
coming from the free and polished desktop side (*cough* Ubuntu).