I could tell it was slower than my TN panel that I had, but it wasn't enough to make me want to switch to gaming exclusively on the TN. I found it perfectly suitable for gaming until I tried a 120hz monitor (Eizo Foris FG2421). Now I could never go back to the Korean monitor. My suggestion would be to exist in ignorance and never try a monitor with 120hz and you should remain quite happy with your purchase.
ncx recently updated his qnix review after using smt tool 2.0, and he found that the qnix qx2710 had less than 3 ms of input lag, and that was at 60 hz.