Anyone who thinks an NV30 was even near the machine that rendered those pics is simply deluding themselves.
The pics are identical to those on exluna's site. Killeroo uses path tracing, which simply isn't possible in anything approaching real time.
Now, you might argue that they were rendered on the NV30, just not in real time. With the NV30 just now completing tape-out, and the fact that some of these images are from early this year and evel last year, that is simply impossible.
It was bad leaked information, nothing else. Perhaps nVIDIA intends on using these images as a demo, much like ATi's animusic demo, but they haven't done that yet, and the images posted were software renders done off-line months ago.