Legend's Sam Brown on shadow support:
Unfortunately, WoT won't support shadows and there's no intention of including future support (that I'm aware of). From what I understand, it's a speed issue. The Unreal engine wasn't designed with shadows in mind and getting them to work easily isn't...well, easy. As shadows are basically an asthetic enhancement they aren't a focus of current development.
As for the TNT card's stencil buffer, as I understood it, this addition to Unreal was both extremely slow and pretty bad looking. For those reasons it was never integrated into the Unreal codebase. And as others have already said, it was only usable on the Creative cards using their drivers. That's a VERY small audience to cater to.
Sam Brown on framerates:
Basically, your framerate can never exceed the speed with which your screen is updated. For example, if your monitor is refreshing the screen at 60Hz then the image on the screen isn't going to run at anything faster than 60fps. Of course, you could turn VSynch off, which will allow your card to try and update faster than the screen refresh, but that can cause some strange visual side effects (people usually describe it as tearing).
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