I doubt that was the author's intended definition. His article does not seem to be an attempt to distance himself from the sort of behavior your definition of a jester would commit.
I'm not intending to be obtuse. Even after a second reading, I still don't think the description you give quite matches Drew's use of the term. In his description, wikileaks is being brash and causing trouble, not just shining a light on absurdity through wit. Further, wikileaks is not using any wit, simply publishing everything verbatim.
If Drew hopes to be taken seriously by the US Government and keeping his security clearance (probably highly valuable in his career path) he can't exactly cheer about Wikileaks. This sort of measured, slightly negative review is essentially a bow to power (and there seems like little reason for him to write such an article other than to bow conspicuously before authority).
Drew is also a Homeland Security Fellow, whatever that is.
