NWN - Original Design Doc?

Lucky Day points out a new item at RPG Vault from a user that purports to be (part of) an original NWN plot overview document.  If genuine, it reveals a different context was originally envisioned:

Unlike disease and poison, madness has no specific effect in the 3e rules. For our purposes, madness is best depicted via illusions (for more details on illusions, see the “Illusions and Invisibility” section of this document, p.80). This may involve seeing illusionary monsters when there is really nothing there or seeing more monsters than there actually are in a given battle. Creatures, including fellow party members, may fade into and out of invisibility, cycle through a series of monstrous models, or suddenly burst into flames (or some other visual effect) before the madman’s eyes. He may even hear randomly triggered hotkey voice files from monsters, NPCs, and fellow players. Mad characters will also be haunted by an urgent cacophony of whispers whenever they attempt to rest. Lastly, custom-scripted events can also be linked to madness checks, allowing us to tailor madness to the actual campaign through visions of past characters and other such devices.

There's absolutely no information about the poster or source but it cerainly reads as genuine.