I've used both of those screens and the responsiveness is every bit as good on the B2430H. And good choice BTW!
Nothing major. Slightly better 'default' colours and higher brightness but once you've tweaked to your liking the image is very simlar on both.
Unfortunately it is detectable, yes. People who are used to super responsive CRT monitors, for example will be more tuned-in to detecting the trailing of even a highly responsive 2ms LCD panel. The human eye can detect a surprising amount if the brain is in the right gear.![]()
When I play on rock band/guitar hero, the response time on tv's is a maaaaaaaaaaaajor thing. E.g. my computer monitor is 2ms I think and I play fine on that but on my TV it's more and I have to tweak with the lag calibration which sucks ass.
But if you're not using it for that then you won't notice a difference.
Don't get 'human limitations' confused with the limitations of technology.AFAIK isn't anything under 16ms undetectable (by the human eye at least)