It's a great Glee story, true to the series in every sense. The New Directions are losers, too, when viewers are first introduced to them, and they become something great. The Adams Apples may look like a ragtag bunch, but their "Baby Got Back," presumably sung in Jonathan Coulton's style to make them seem more odd, is terrific. It's hard to believe that they are shunned by their peers, unless the style of music is just considered a lesser art form, but I'm sure Kurt will turn that around.
Kurt has always marched to the beat of his own drum, so it's really no surprise that he would ignore advice and join up with the Adams Apples, especially when there's a cute boy involved. Adam is a senior, so any romance will probably be temporary, tiding Kurt over until Blaine can get to the Big Apple next spring. I'm fine with that, as Kurt deserves a little happiness, and Adam should be a fitting placeholder.
Unfortunately, "Sadie Hawkins" is not a bright spot in the season. Zizes, Adam, and "Tell Him" don't make up for the school dance itself and other weak numbers. The plot gets hokey, and goes off the rails a bit. However, it's not a terrible installment, and if this is the weak point in season four, which I would argue that, so far, it is, it will still make for a fine season overall.
Glee airs Thursdays at 9 p.m. ET on FOX.