[ProDigit]

If you ask me, I've used the device quite extensively. I kind of know the response time by now,and I feel it's faster, but not that faster on epub. I think mainly because it does not refresh every page. I don't use a stopwatch but the sensation of latency is somewhat familiar to me, when working in an audio studio finding the optimal buffer size for audio applications.
Believe me or not, but the 'human mind' is quite capable of detecting upto a 10ms difference in audio applications,and upto 1ms when source and secondary source are compared simultaneously!

I obviously have less experience with screens or visual delays as with audio delays; so I'm not saying I'm dead on with those numbers above, just a rough estimate of how it FEELS to me, plus or minus 200ms.


It also may be noteworthy that when setting the page turns to 5 page turns before refreshing the screen, the edges and detail lining of the letters of the text on the screen are somewhat jagged, most people would probably only notice with a magnifying glass.
Nevertheless I had expected to see ghosting, but fortunately so far, I've not seen any ghosting in the text, even with page refresh set to every 5 pages!
I yet have to test images,as they are more demanding,but text so far, gives me a positive experience!
Nevertheless one can set the screen to refresh every page flip,every 3 or every 5 page flips. And should a page appear ghosted, on a normally good or well working configuration, one can always manually refresh the screen by tapping it with the stylus.