Cult movies have quicker turn around for some reason. Used to be years before an underrated film gained a cult following. Most of the oh so greatest films of all time were flops that gained respect (though in the case of Citizen Kane, it was a smear campaign by the Yellow Journalist mogul they were making fun of). Now these films somehow find their appeal much quicker due to the faster turn around to home video and cable airings (Netflix too). I can tell exactly what fanbase Pitch Perfect clearly has. Geeky, awkward tweenage (and some into their 20's) girls that don't like things geeky dudes do. I give the films all the credit in the world for starring awkward, geeky girls (again, their fanbase as they want to see movies with similar versions of themselves). But all and all, this thing is just a line of "we're edgier than our predecessor" projects. High School Musical begot Glee, Glee begot Pitch Perfect. I mean, try and tell me they had no intention of one upping Glee with this film. It's not a knockoff, it's a total "screw you, we're better!" Kinda like what Battletoads did to TMNT... except Pitch Perfect isn't infinitely worse than Glee (one's an awesome line of comics and cartoons and action figures, the other's a series of awful video games with abusive difficulty). As you kinda figured out, I don't like Glee. Hate HSM more, but yeah...
The weird thing is how comedy sequels either tank like heck or push everything else off the box office. 22 Jump Street and Hangover 2 managed to make short work of Dreamworks films. And both films seemed to basically say "the studio wants us to make comedy movie sequels of comedies that clearly won't work as sequels, so we'll just keep winking and nodding at the audience about how stupid this mandate is." Hangover got 3 movies and so didn't 21 Jump Street. And honestly, I don't think they can pull off a third one without ruining the joke at the end of the second (if you saw it, you know what I mean). Then other comedies, first time ones even just disappear. Disappointed that Jim Carrey's Wolverine publicity scared potential film goers away from Burt Wonderstone. It's a far better movie than the trailers suggest, and Jim's actually 1990's Jim levels of funny in it.