Carl
I was at tzuccs house the day we had our audio meet at his house. He was running a TRW as an IB. In fact Thigpen flew in on his private plane to be there for the event. I was in the rear of the room and it was like being in an earthquake. I had motion sickness for hours after that subsonic demo.
Yes, I remember a couple of events at tzucc's and one where we filled out questionnaires for the installation guys. The system didn't make me dizzy, but it definitely made me feel weird. Even though you can't "hear" the subsonics, the demo proved to me that the region from 1 to 20 Hz changes the perception of the music, i suppose much like supersonic harmonics also influence what is perceived. More spacious and more real when not over done.