how should we know? we would have to do the same thing as you ----google it until we find an answer, if there is one.
ultimately its a waste of time though.
you looked at the specs, it said 5ms. now read some reviews. if people are complaining about ghosting, lagging or other such problems steer clear. if the reviews are mostly good then its a sure pick.
instead of getting into specifics sometimes its better to just do as i said above. will certainly be easier (and can be just as accurate in this case!)