As for PS2.0 speed, we have yet to see a PS2.0 game with an NV3x optimized path running with the new 52.16 compiler. Will be interesting to see when HL2 comes out how the cards stand up, as HL2 should meet that criteria.
define NV3x optimized--OH WAIT. the 52.16 drivers simply make PS2.0 things NV3x optimized automagically.
so, no, the PS2.0 speed simply isn't as fast.