Interesting article - interviews with surround mixing engineers not named Steven Wilson. You'll have to buy the physical magazine to read the entire article but there is still plenty to read on the website;
http://www.emusician.com/techniques/0768/surround-mixing-master-class-interview-outtakes/154371
http://www.emusician.com/techniques/0768/surround-mixing-master-class-interview-outtakes/154371