The review talks about the panel that the Planar uses(not the Planar model itself).
"Several months ago, we looked at Hitachi's 16ms response time LCD. This monitor was based off the first commercial 16ms panel, AUO's M170EN05. While this panel is good, it has a few adherent flaws to it. The first flaw is, of course, the 262,000 color limitation. Even though 16M colors can be achieved by dithering the pixels (emulated 24-bit), the evidence was clear when comparing our Samsung 172T and the Hitachi CML174 that Samsung had a dominate edge on color reproduction. Granted, AUO is working to fix that, but the limitations of the TN display mode will probably hinder their progress."
"The pie gets sweeter the deeper you dig. As we mentioned earlier, the AUO 16ms panel uses a tweaked version of the TN display mode. While this worked great to keep the electric modulation down (that's how it achieves 16ms response times), it does not provide the best characteristics for viewing angle."
"Although panel prices have been getting cheaper, innovation in the section has been near stagnant for 18 months (some people considered the 18-bit 16ms TN panels from AUO a step backward if anything)."