Sundance long ago came of age, and now, some critics think it may be experiencing a bit of a midlife crisis. How else to explain the sudden influx of films that make a point of displaying their youth bent? This year, it seems that nearly every film is either another “generic teenage wasteland” or a “Sundance afterschool special.” This is not to say that any of these films are bad, you understand, just that for Sundance to feature quite so many of them at once seems not unlike the 40-year-old account executive who fights off ennui by buying a Ferrari.