I caught this off the LCD buyers giude:
TN (Twisted Nematic): Without an ODC (overdriving circuit), this type of panel offers the fastest pixel response time. This does however come at the expensive of viewing angles and color fidelity. Out of all TFT-LCD panels, the TN type has the lowest contrast. It is also a 6-bit color depth panel, meaning dithering or frame rate control (FRC) must be employed to reach close to a full 8-bit depth. Pixels in their active state on a TN are black, while in their inactive, white.
Is my answer in this breakdown? I'm so ignorant on LCD tech I really don't know. I still use a 21" CRT but I'd like to learn; a local retailer has a TN panel Viwesonic for a seemingly low price... Thanks again.