I got to use my NEC puck on another PA241W.
One thing I noticed is that if I measured white point right after startup I got .310,.329 pretty close to the standard, but if I let them warm up for 15-30min I got the .307-.308-.330-.334 range values.
What compensation mode and what part of the screen you measure the primaries on also makes a bit of a difference.
sRGB spec is:
For screen1 I got values along the lines of
R .634-.635, .330
G .297-.300, .601-.605
B .151, .060-.062
W .307-.308, .326-.331
R .639-.640, .325-.326
G .299-.301, .602-.604
W.306-.310 (mostly near .307),.330-.334
Anyway it seems clear that:
0. the NEC puck I have is doing a pretty solid job on measuring sRGB primaries at least, probably within .002-.003 of perfection
1. since probably no screen under $4000+ is super, super 100% even, there always has to be a bit of something off a little someway or another, especially the white point, so modest variations are sort of meaningless.
2. the sets will vary a bit in factory set primaries, but not too much really, i'm sure the probe itself is a bit off but there were some consistent difference, the screen2 tended to have a bit higher By and Rx and a bit lower Ry compared to screen1 so there will be modest screen to screen differences from the factory, but it would seem they probably vary at most .005 and more like .001-002 on avg, not bad at all
3. aside perhaps from the WB being a bit cool (and you are free to adjust it yourself), the sRGB mode is pretty solid indeed
For reference here are the primaries as measured by a DTP94b of a Samsung HDTV (standard, NON-wide gamut) after careful calibration:
(all luminances within 1%)
Notice that this actual NON-wide gamut display appears (granted we are now using two different probes, etc. so some error may be false and it all gets a bit dicey) to have a noticeably farther off from spec R and G, only B is a trace better.
Overall, the sRGB emulation mode of the PA241W actually comes closer to spec than a typical sRGB display (and one that even has a full-control CMS at that) at least in terms of gamut even straight from the factory! The WB does appear as if it probabyl does come a bit cool from the factory (although it could just be my probe) but it can be adjusted. So I currently have the sRGB mode more true to sRGB than my sRGB HDTV.
Of course there is the whole metamerism issue, which is kind of a tricky thing.
In terms of native gamut screen 1 and screen 2 had one slight difference measured, for some reason screen 2 By only went down to 0.06 instead of 0.055, which seems odd.
The screens were fairly different in the ways in which each demonstrated some non-uniformity (as all screens do).
And for photo editing all of this is somewhat irrelevant, for the most part (maybe someone picky ones to drop to sRGB to pick out subtle skin tones within the sRGB gamut), since you'd certainly use the native gamut. But for all the non-managed stuff....