Knowing Vladimir [1], he likely means that they use exposition of stupid things like Conservapedia and Christian fundamentalism to bash all kinds of right-wing thought, especially the American variety, while not investigating liberal cognitive failures enough.
http://rationalwiki.org/wiki/Conservative
(Note that the article above, while ridiculously biased, does have one good section, the one on the relativity of the term. And, aside from any ideological neutrality, even a moderately smart left-wing fanatic wouldn't list Ann Coulter among "Prominent conservatives" but exclude Burke or William Buckley.
So my impression is that the people who were writing it are not necessarily all that politically motivated and "brainwashed" - just unintelligent and/or ignorant.)
[1] Not knowing him, of course, just having read his many previous comments on the issue.
I could be wrong, but the biggest problem with that article is that they keep conflating the US-ian meaning of the word "Conservative" with the more general meaning. As you said, they tried to separate the two, but pretty much failed. IMO their article on Liberals is much more disappointing, as it's just self-indulgent satire without any meat behind it.
That said, RW's mission statement is to combat pseudoscience and authoritarianism; so at least they wear their biases on their sleeves. They don't claim to advocate for rationality in general, desp...
I am not sure whether this has been posted here before but I came across this: http://rationalwiki.org/wiki/LessWrong
What do you think about RationalWiki in general, and their opinion regarding LW?