The turnaround time from RHEL 7 to CentOS 7 is a hell of a lot better than it was for RHEL 6 when it took a very long time for CentOS 6.0 to materialize. Of course, earlier this year is when Red Hat hooked up with CentOS. Today's release is just a public test release with no guaranteed compatibility/support against the final CentOS 7.0 release, but it's out for those interested in testing.
Those interested in learning more can try out the CentOS 7.0 QA release with information via the seven.centos.org blog. When I'm back in action in July hopefully the official CentOS 7 release will be out for running some interesting comparative benchmarks.