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@ Infamy79 )

you are mixing up input lag and response time

older LCD TVs may have a longer response time (meaning the liquid crystals need more time to change their orientation and hence their color), but have less input lag, because the picture input the TV set gets is shown nearly instantly (CRTs still were faster), while on newer LCD TVs (and esp. LED LCDs) the picture is processed in many ways, which takes time..

LED TVs gain a brilliant contrast due to local dimming of their backlight, but to know where the TV has to dimm it's backlight each picture must be analyzed and processed .. the current gen Samsung LEDs seem to be quite slow at that resulting in a notable difference between e.g. the moment of you pressing a button and you seeing the result on the screen