We just got ourselves a copy of the PC version of the game in today and decided to skulk around in some shadows for a while. The game, while still pre-beta, runs surprisingly well. The performance problems that we had with Deus Ex: Invisible War are non-existent. Whether this has to do with easier AI considerations, the fact that there aren't quite as many interactive objects with physical properties, or just that they've figured out the tricks to the engine, it works. It works well. And it works very, very prettily.