There is no 23 or 24 fps hdtv. The NTSC standard is 29.97(30fps) or 59.94(60fps). Film is shot in 24fps. Before tv's used to have to use 3:2 pulldown to display 24fps. With the advent of 120hz, 24 fits into 120hz exactly 5 times, so no more 3:2 pulldown is needed. The HDTV is not really 120hz, it simply just interpolated two frames and creates a "fake" frame in between.
1080p is 1080p no matter what the size of the monitor. The lag you see is probably the result of the tv's processing "enhancements". Tv makers simply do funky things with the signal to make it look better. The tv's processor gets the signal, jacks with it then shoots out the adjusted signal. It creates a little lag. Usually this doesn't bother the normal tv viewer because we don't interact with the display in realtime to notice the lag. But if you ever noticed how much longer tvs take now to change the channel? This is partly the reason why. My oldschool 20 year old sony tv used to switch channels faster than my brand new hdtv. (also other factors like new digital signal acquisition, decoding) But i regress, If the tv was connected via hdmi then there's a good chance it went thru to enchancement. Connecting it via VGA would prob yield less lag, that or "game mode". Usually that bypasses the tv processing.
Is tv processing really there? If you've played any kinda guitar hero game or timing game, you've probably noticed a timing calibration setting. This delay the game so your keystrokes will match the game.Edited by soymilk - 11/12/11 at 4:14pm