Interesting, but I bet none of those were cropped much, and most of the images he posted on that page were like 400x600. I'd have to see the same shots taken with another camera to make any kind of judgment. Without a basis for comparison, it doesn't mean much.
It does. Based on the exposure settings he shared (f/5.6, ISO 40.000, 1/20th (!!!) of a second) you can deduct that this is absolutely silly dark... pitch-black even... it's amazing he even managed to get accurate focus on his subject in that kind of darkness.
Of course these are downsized without cropping (he does share 200% crops in his post though). If you were to view this without NR and at 100% full screen you'd probably see a ton of noise.
But that's not the point. The point is apparently you can make pictures in total darkness which are (after processing) ridiculously sharp, noise-free, still have contrast and some colour in them, so at the end of the day: perfectly usable.
I have a very hard time replicating these kind of results, so I'm in awe of this (assuming they are real).