I actually found the first movie in the series to be an okay coming-of-age comedy that was mischaracterized by many viewers and reviewers as solely a gross-out piece. The first one wasn't; this one is.
While the first movie featured a set of interacting story lines that complemented each other, this one has no story line at all. What plot there is exists solely for the purpose of stringing together a few random skits. "I'll just pop over to band camp for a few minutes a do some funny business with a trumpet!"
In fairness, some of the skits are amusing. Others remind me of those awful mid-period SNL skits where you could see the actors waiting desperately for the commercial. The twist with the "band camp girl" in the first movie was funny. But somebody on the screenwriting team here doesn't understand the concept of a "joke." You've got your set up, then your punch line. Then you move on to another joke. It's really not that funny to stand around and repeat variations on the punch line (unless your sense of humor is in the "Ha ha! she said f---!" vein).
More fairness: the actors and the director here are capable. For the most part, it's a craftsmanlike piece of work, but an uninspired one.
A year of college hasn't matured any of the characters. One wonders what future sequels will be like. I suspect "American Pie 9" will wind up as something similar to the slide show Jack Nicholson presents near the end of "Carnal Knowledge."
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