HDTV question. 120Hz vs 240Hz?

[rckrz6]

the tv should be set in game mode when playing games. which disables motionflow, automotion plus, ect.. to avoid lag. i own a 240hz tv and i really can;'t tell the difference between that and a 120 hz tv. 60hz tvs do not judder unless your trying to watch something in 24p