WP Engine is actively updating to 3.5.1 now
WordPress 3.5.1 has officially dropped, and we wanted to notify you that our team is pushing the update to ALL customer sites as we speak. This new version includes security updates, and as your managed WordPress platform, it’s our responsibility to roll those security updates out as soon as they are released. This ensures your WordPress installs maintain the utmost security.
We’ll notify you once all the sites have been successfully updated. If you have any questions, as always, please reach out via a support ticket.