It isn't, at least, not in the sense of being a story whose punchline is "...naq vg jnf nyy n fvzhyngvba". You would already be foreseeing what Roko has mentioned by the end of the second screenful (and crying out, "Ab! Ab! Lbh znq sbbyf, unir V gnhtug lbh abguvat?").
Reading through it now. There are two relevant words in Roko's description, only one of which is obvious from the outset.
Still I'm not sure I fully agree with LW's spoiler policy. I wouldn't be reading this piece at all if not for Roko's description of it. When the spoiler is that the text is relevant to an issue that's actually discussed on Less Wrong (rather than mere story details, e.g. C3PO is R2D2's father) then telling people about the spoiler is necessary...
This is our monthly thread for collecting these little gems and pearls of wisdom, rationality-related quotes you've seen recently, or had stored in your quotesfile for ages, and which might be handy to link to in one of our discussions.