I can spot 0.5ms of lipsync error if I am adjusting away from correct lipsync. However, if I am viewing an unknown setup I couldn't tell you whether it was 2ms wrong or 20ms wrong, but I could tell you it's wrong. Once your lipsync is correctly locked to the video it's *very* easy to see it move out of sync even with 0.5ms adjustment.

Lipsync never used to bother me, but one day I spotted it was out and that was it - it drove me nuts until I fixed it... And now I immediately spot discs which are out and can quickly adjust with my Crestron. HD discs have, generally speaking, been very consistent - they are either accurate or consistently out by at most a couple of ms - The Matrix on the other hand drifts throughout the film which is incredibly annoying.

Mark