Not that they aren't brilliant photos, but they are definitely touched up. The first image on this page has shadowing in the corners of the photo that could not be created except as an after-the-fact touch up, not too mention the color wash that the photo has undergone.

This looks straight out of a Lord of the Rings movie which underwent significant post-shoot touch ups on almost every frame.

It appears that his photos are using The Orton Effect

Here is another photo on Flickr that exhibits the effect in question.

Regarding the amount of 'touching up' or 'post-processing' involved, I'm not certain where to draw the line. Simply having the subject turn to face the camera is 'doctoring' the shot in some way. The shutter speed and f-stop also impact the image. The type of paper it is printed on, the amount of color correction, artificial or mechanical 'vignetting' , etc., all bear in some way on the quality of the final image, and not all in a 'bad' way (where 'bad' is defined here to mean 'over-produced' or 'over-encumbered by style').

There are those who try to combat 'over-production'. There is a notable example in the film world, in which a set of rules is defined in such a way as to produce a film that forgoes all the extra trimmings: no artificial lighting, no extra foley (sound) production, no extra props, only handheld camera, etc. It is known as Dogma 95.

More cool pictures here, this time from Russia.