HDR is definitely an area where masters can get amazing results, but happy amateurs can just as easily conjure stomach-churning results... what worries me is the quantity of shots in the later category that still end up on Flickr or whatever - surely they can tell how bad it is when they decide to upload it??
That particular collection has a few stunners, but also a lot of dross to my mind. It seems sometimes people get so wrapped up in the technical side of shooting HDR that they forget to actually shoot a well-composed, interesting scene to begin with.
I'm a musician, and for me the overdone HDR is analogous to the over-long widdly guitar solo favoured by metal guitarists - sure, there's some technical skill involved that is appreciable on some level, but if it doesn't say anything that I don't see the point.