I have no idea what to do in the slightest. I don't understand why mine would test so damn high. Something has to be wrong with my controlled environment. Every processing element is OFF, even the color matrix is set to native so there isn't any color correction processing going on. If you think about it, camera testing is always "faster" than the LB device by about half, so that means instead of getting 40 ms via camera I'm getting 80, which means that the LB device would clock it by about 110 since it usually adds about 20 to 30 ms of "correct" display lag? That's ridiculously high!
I hate to do it, but maybe I should test with my older Geforce 7900 which has component out instead of HDMI. Then I could test the component ports on the set, and if they're not laggy, then it's a HDMI thing. Bah, so much effort for so little gain.