In our A-B tests (there were only two of us for this testing) we were playing 'Driven' (2 copies, on on each HTPC playing using and Extron switcher box). The video quality of this DVD is QUITE high, and there is a LOT of motion. Neither one of us specifically noticed any differences in motion panning. On Monday, we will specifically look for any of those differences, but if there are any, they are going to be VERY subtle for us not to have noticed in the first round.
Oz