I'm not sure if i'm stating the absolutely obvious here, but he is not talking about alcohol. there have been reports that other substances assist the queasiness. I have not heard of many instances of sickness with the DK2, the low persistence certainly helps. The only time ive felt slightly queasy was at the top of a roller coaster, and im sure that would make me feel queasy anyway.
Anyway, I am one of those unforuntates with a DK2 and an AMD card. So looks like I wont be playing DCS with the DK2 until Edge.