That would seem to be true. I have an NEC P221W - supposed to display 95% Adobe RGB and 99% sRGB, etc. Have calibrated several times it with a Color Munki device to no avail. Even after calibration, color is hyper saturated to the point I can't really use the monitor. Perhaps I should invest in the NEC device. For one thing, Color Munki profiles do not seem to affect the brightness of the monitor. Perhaps the NEC calibration software will create a profile that adjusts brightness as well.
Pablito,
The NEC software works with several manufacturer's colorimeters, or the one NEC sells. The NEC colorimeter is made by X-Rite and is similar to the X-Rite Eye One Display II.
My first NEC monitor was a 2190uxi. I already had an original Eye-One Display, so I figured spending the money on the NEC software and hardware was a waste of money. Boy, was I wrong! I tried calibrating with the Eye-One Match software that came with the Eye-One Display, and the prints were way off from what the screen showed.
Since the NEC Spectraview software works with the Eye-One Display, and I already had one (at the time, NEC's device was an original Eye-One Display), I got the software, which was about $170. Worth every Centavo!
The 2190uxi worked beautifully with the NEC software and the Eye-One device. I don't know if the software supports your color munki, but if it does, I'd get the software first and try it before buying the NEC device if money is tight.
By the time I got my PA241W, X-Rite had introduced the improved Eye-One Display II, so I decided to buy the NEC version of the colorimeter. I already had the Spectraview software from my old screen.
The value of the Spectraview software, regardless of what brand colorimeter you use with it, is that it adjusts the monitor's brightness, color, and contrast internally rather than manipulating the computer's video card...this gives more distinct colors and gray tones, for more accurate display.