Here are some tests of a seiki SE39UY04:
Sorry for the ****** camera but you can still get rough values. Tomorrow I will re-do this borrowing my dad's nice nikon camera so I can get better shots:
Seiki @ 60 Hz with CRT @ 60 Hz:
I read 39.318 and 39.283. Difference = 35ms
Seiki and CRT @ 120Hz
I read 33.535 - 33.526 difference = 9ms (I have actually been quoting @ 1080p 120hz lag is 9ms...
Seiki and CRT @ 180Hz:
I read as 57.963 and 57.955 Difference 8ms:
On both these are hard to make out. I am going by which parts of the numbers are more outlined as they do kind of blur together. I do see that the LCD transitioned to from .8 to .9 here but there is still after glow of being .8 but I am just testing input lag here and not response time.
CRT at max (180Hz) Seiki @ 240Hz:
CRT is decently clear here....
I read it has 40.188 and 40.185 but again its hard and subjective. Difference 3ms
CRT at max (180Hz) Seiki @ 720 Hz:
I read as 48.032 and 48.029. Difference: 3ms
Even with the hard to make out letters I think one thing is clear is that input lag is going down as refresh rate goes up.
Hopefully better results when I test with a better camera
I will also do a comparosin between at 4k and the CRT as well tomorrow.