LASIK was approved by the FDA in 1995. Do you run RHEL 2.1 (released Oct 1995) in production because you're letting other people beta test this new stuff like RHEL4?
Even though many people see Oracle's Unbreakable Linux as CentOS with a nice kernel, that doesn't mean Oracle isn't doing some absolutely bleeding edge Linux work. For them to commit to officially supporting btrfs in their OEL builds means that they'll commit to supporting it in real production environments. That does say an awful lot about it coming from the company who employs the lead developer of said filesystem.
Give it a year or two of solid beating and it will be good to go. My personal take is that if ext4 gets stable snapshotting support, it will be good enough for most people.