Yeah, it's a little bit of a 'turd in the punchbowl' with regards to OS X criticism. I stand by my opinion that Snow Leopard was the last version of OS X that I felt truly enhanced my experience, but a lot of what he says in the article is nonsense.
Snow Leopard was indeed the high water mark for OSX, and probably will be. It will be a real shame when SL is end of lifed and 3rd parties no longer target it, etc.