okay, here's what I've found: the game runs slowly, no matter what res you play at. turning off Specular will boost your framerate a *lot*, but the game will also look like Quake2 with lower-poly geometry. There's no reason for this. Specular does near no framerate hit in most games. I'm expecting a driver release soon enough that is a workaround for Gearbox's piss-poor conversion skills.
reviews of around 80% must be completely ignoring the single-player game. it's rinse, repeat without the fun of co-op play that made the Xbox version tolerable. the maps take repetition to levels that Pong couldn't reach.
The multiplayer is quite amusing, when it works right. I think this one's gonna find itself being the amusing Lan game that gets pulled out when 1942 and ut2k3 are played out...at least until ut2k4 comes out. I swear that's why Halo came out with it did...because they know that 2k4 with vehicles is gonna be everything Halo is, but smoother and prettier.