I think that it was not apparent what it was a satire OF - but it was clearly a satire of the few professional critics of the first movie who JUST DIDN'T GET IT. I read the reviews - and some critics actually had some of these as complaints about the movies!
I think the author here was spoofing these critics in the same way that the "Protest Return of the King" site was spoofing the "Protest The Two Towers" site. It's just not apparent if you've never run into those truly oddball reviews of movie critics who criticized Tolkien's books as being "unoriginal."
P.S. - Thanks for the link - I loved it!