Per James Morris Jaguars Official Fantasy Writer, "Jaguars OC Dirk Koetter isn't expected back in Jacksonville for the 2012 season. The Jags are reportedly considering ex-Packers coach Mike Sherman and Falcons OC Mike Mularkey as their next head coach."
This is pretty much what the national consensus has been recently...so it's not much of a surprise. What is a surprise is hearing it from an official Jaguars writer (on his Facebook). I believe it gives it a little more credence.