Originally Posted by sdg4vfx
Interesting points - do you think the Custom mode's RGB tracking is necessarily "bad" or just something that varies panel to panel? ("Bad" to me would mean it shifts, is undependable.)
It's bad. RGB (red, green, blue) are so far from reference, dEuv is off the charts (which is again the error % from reference). Check out Chad B's
review before and after calibration report for Custom mode. You need a meter to apply the correct offsets to get RGB tracking where they should. Your eyes are generally not a good tool to do this.
edit: I think Chad B's "Before" might actually be of Standard mode or Custom Mode in the default "Normal" color temp. It's actually not as bad as I thought if you use Warm2.
FWIW, I have a 65GT50 and the difference between Cinema and THX Cinema is very slight. I'd characterize it this way - if you're watching during the day or when there's ambient light the difference is very, very difficult to see. But at night or when it's very dark you can see the difference more clearly, but even then the difference is still slight.
Shadow detail is what is affected most by gamma (which is mid-tone brightness). As you lower gamma, shadow detail becomes more visible but at the same time washes out the picture. I haven't actually compared, but I would imagine that gamma differences would be more noticeable in a darker room vs a bright room which might explain what you're seeing. IMHO, a lower gamma is better for a bright room and a higher gamma is better for a dark room. My HT area is usually dark so I prefer to set gamma to ~2.35. Anywhere between 2.2-2.5 is ideal.
Also, one of the things that is most surprising and pleasing about this year's plasmas is how bright they are. The THX Bright/Day mode would have been more useful on previous years' plasma's!
Knowing what I know now - my original plan was to get the ST and I'm sure I would have been happy with it ; )
Custom mode is capable of the same brightness as THX Brightroom. But ya, these 2012 Panny's have improved efficiency and are therefore considerably brighter than the 2011 models. Add to that the improved black levels and the dynamic range is significantly better, giving the picture more pop.