The Battlefield 4 AMD Mantle patch has now been delayed to some time in January 2014. A survey has been emailed to all active EA account holders, who have played or are still playing the game.
EA are saying emails have been sent to all account holders though there is no clarification whether only PlayStation 4 users got the emails.
After much consideration, the decision was made to delay the Mantle patch for Battlefield 4. AMD continues to support DICE on the public introduction of Mantle, and we are tremendously excited about the coming release for Battlefield 4!
We are now targeting a January release and will have more information to share in the New Year.