I think its done it at least twice. "About a Girl" and "Krill" were both much better than what you describe.
That, like, or dislike of an episode is purely subjective goes without saying, but whenever I see people make this type of comment about "About A Girl", I always think that maybe they're really referring to the episode's premise and not the actual execution of the episode.
The premise; what happens when a couple who are part of a planet full of nothing but same sex people, give birth to a child of opposite sex, is extremely interesting and potentially provacative. However, the script, written by McFarlane, misses nearly all of the premise's potential.
Without going into detail, the message of the episode seems to be that women who have some exceptionable ability are worth keeping around. To McFarlane, I guess, this was a profound revelation. The message should have been, that women are worthwhile simply because they are beings just like males, deserving of basic rights, etc.
This episode also contains one of the worst jokes of the first 6 episodes of Or. The helmsman, whose name is LLamar, and is black, drops a joke about Compton, Ca. These types of jokes, which do not flow out of science fiction, or the story, litter the first few episodes of Or. and are a big turn off.
Now, The Krill, which I just watched last night, was, I believe, the first episode that didn't have at least one big fat predictable generic verbal joke in it. Key word is
generic. I'd like the show better if jokes flowed out of the show's science fiction and story, rather than generic jokes that could fit into any show, whether the show is a comedy or drama. Having a character fist pump and shout, "That's what I'm talking about!", is just plain cheap. We've all seen it dozens and dozens of times. Think about the way the jokes in Firefly were presented. All of the jokes seemed flowed out of the show's science fiction or the story, and none were generic.
I didn't check, but I would bet that The Krill wasn't written by Seth. To me, this is the show's key to evolving into something that might eventually become memorable. Maybe use his story ideas, but keep Seth's writing to a minimum.