There's a lot of reasons not to use Oracle Linux, most of them non-technical. Oracle is simply not an ethical member of the Open Source community, and if you trust them, they will screw you, some day, some way. Red Hat may have their flaws, but they've never sued over patents and they've never attempted to destroy competing projects or companies through legal threats and bullying. CentOS may be slow to jump on updates sometimes and to get out new releases, but at least it's a good Open Source citizen.
As an aside, if you want a faster moving RHEL rebuild that has paid developers working on it, you might try Scientific Linux. It is built by CERN and Fermilab, and tends to be very solid and fast to update and invisible (i.e., I don't think about it, at all, and it Just Works). We switched from CentOS to SL back when CentOS 6 was so late being released; couldn't be happier with it. We added support in Virtualmin for SL for just that reason...so many of our customers wanted 6, it was worth the effort to add a new OS.
So, yeah, Oracle is gonna have to have a "come to Jesus" moment if they want to participate in the Open Source community. They've got a lot of repenting to do.