The auto update appears to be available (on the west coast at least), but you may need to sign out and reboot your Xbox to trigger the download. Microsoft told us the update process will be complete by noon PST so maybe different regions get it at different times.
We also decided very last minute to reset the Leaderboards when the auto update completes to start everyone with a clean slate. Regular Leaberboard resets will happen every two months from now on.
- VC