They look reasonable enough. Most mid-range rigs should be able to run it, but if you were thinking of what kind of new PC to build, the recommended specs do make for a nice guideline. While the recommended quad core processor didn't include any model or speed, it's safe to assume you'll be fine with an i7 920 or something like that.
[Update: The Witcher 2's newsletter has some more info on the AMD/ATI specs, which has been added to this post. We have not yet received any reply to inquiries about what kind of "quad core" or reference resolution is assumed]
Znamy wymagania sprzetowe Wiedzmina 2! [Polygamia]
Put a dinosaur head on your spaceship in Habitat: A Thousand Generations in Orbit
6:30 PM on 07.30.2014