I finally got around to watching Glee (on DVD). It's a cute show, and I recommend it. People smarter and hipper than I am recommend it, too. (There are a few holdouts.)
I think the script has been influenced by shows like The Office. The characters are crude stereotypes with not much depth, but the lines are funny enough to make up for other faults. Still, when it comes to dysfunctional high schools, I miss Buffy. It makes perfect sense that a high school might be situated on top of the Hellmouth.
I do have to say that Glee's music makes me feel old. I know all of the show tunes and standards better than is seemly, and I don't get the hip hop at all.