Many others have already posted great observations about Superbad and why it's a top flight coming-of-age-story/raunchy comedy. I agree..., the film is a strong accomplishment. Accordingly, I'll maintain brevity.

I'm 35 years old and can attest that high school in the late 1980s was quite akin to the situations Seth, Evan and Fogel (McLovin!) experience throughout the long day's journey into one of their last high school Friday nights.

Combined with lots of realistic, for high schoolers, crudity/awkwardness(awkwardness breeds crudity in high school kids, folks--it's called nervous energy) and copious laughs, is a rare, non-manipulative, poignancy.

Selah.