response times do so matter... in the dark days of LCD monitors thier response time was sooo poor that you would get a ghost of the previous frame when attempting to play a game!... just ghastly i tell you....
OLD lcds are only good for (A) reclimation (B) using word on it!
anyways now days we have some tasty LCD screens
12ms or under is perfectly fine for high-end PC gamming, watching TV so it should be good for Amiga output too.