I have a st50 50in. 2D gaming the lag is extemely low and great for fast paced games. Picture mide set to "game". For 3D gaming its also very low lag. If 10points is zero leg i would rate this tv as 8.5 to 9points.
When i first got this tv i thought gane mode by default would be perfect for gaming! But wrong. First enter a standard display mode such as "normal" turn off all the fancy tri ks such as vivid colour c.a.t.s and p-nr. The enter advance settings and ensure intelligent frame creation is turned off. And check that the 3D frame rate matches that of your game. You know when you launch a 3D game on your console the games hz frequency is displayed at the top left of the screen during loadup. Make sure this perfectly matches.
Only the. Can you excite and use game mode this is particularly important for 3D gaming and low lag.
When i first gkt this tv 2D gaming is amazing, but 3D gaming was so laggy, untill i found this fix. Also i noticed that once these settings have been done, even "normal" seems as fast as "game mode".