Well, my results came out a little fuzzy. I've tried using
this test and took some pictures and video, which can be seen in the attachments and link below:
http://www.mediafire.com/watch/e1rj7n3amznc1fl/20140101_081334.mp4My monitor is a Samsung S23B550 so take into account it should have something like 11ms of input lag by itself, or maybe more. From looking at the pictures and video the awkward conclusion is that the monitor varies from 0 to 30ms delay compared to the laptop display. The fact that sometimes but not always the monitor is actually on par with the laptop display puzzles me but hey, technology right? That translates to about 0 to 2 frames behind which is pretty acceptable imo.
Also I've tried to practice some C-Kouma sweep loops while switching my focus and I did not feel anything wrong, but that proves absolutely nothing.
Btw, I was wrong about the VGA converter adding 6ms, the number was actually 35ms.