Well, this is not a post just about the geekier comedies which I love, such as Genshiken (which may not exactly be a comedy, but a slice-of-life series) and The Big Bang Theory, but it’s true for all comedies, and many stand-up shows as well, certainly all those who deal with current events and politics.
I think intertextuality is what geeks thrive upon, and geeks who are into “geeky things” seem to respond and be proud of it, but having watched some comedies that deal with sports, I think it’s true for all geeks – all those who are nearly obsessed with a field respond well to shows that “reward” them for their knowledge, and which separates them from those who do not “get it”. Geeks do tend to take it one step further.
Think of Genshiken, with all of the anime and mangas referenced, and which those of us who watched with subtitles usually had helpful notes explaining what is being referred to. And then you have the self-proclaimed “Big Geeks”, who scoff at those who do not recognize all such references immediately, or TV-Shows such as Stargate where things from the first couple of seasons will show up in season 8 (and then think of conventions where there are minutiae quizes, to prove you’re the biggest fan).