this isn't so much of a problem for most frcs and all but more so for comboing and blocking
frcs you can do off of muscle memory, so even if there is some input lag, as long as its constant it won't make a difference
i dunno if it was lagging or not but on my computer the speed felt off... i didn't really play all that much so i'm not entirely sure what exactly it was... but on my computer it felt a little faster than on ps2