That's no excuse for using composite. Get yourself an A/V receiver and / or some kind of display switcher/multiplexer. If $$$ is the issue, then definitely understood!
Glad you understand that your against an LCD lag tests are not absolute. But, I still have a qualm with your assertions table...
Hi, I registered here to say that I applaud your post very much.
Input lag has been an issue with all digital displays since not too long after they were first put to use in mass.
The biggest reason they remain a problem is that people do not draw enough attention to the issue as you have...