@ SteveF: Regarding your comment "One of the things done right here... was the way the speakers loaded the room. VSA did such a good job that I bet there could not have been more than a couple of DB variation in the entire room. Impressive and very lifelike."
The evenly distributed sound field would have been, at least in part, the result of the new VSA subwoofer/tower integration technology. With this, the subs are placed at the rear of the listening area instead of up front with the towers. There's a control that lets you configure them for their distance from the towers. The result is that the subwoofers/towers work as a system to eliminate bass response nodes throughout the room. This allows the subwoofers to provide the extremely deep bass foundation while seamlessly integrating with the towers.