I don't think they'd play Creed, maybe a bit of Live.
Adult Alternative is pretty much Easy Listening with a slightly hip twist.
See WYEP's year in review.
http://www.wyep.org/music/yir/2007/
Sorry for bringing up this station so much, but at WRCT, my old station, we viewed WYEP as the devil. Well, that, and the rest of radio, especially the Christian station from some bumfuck town that prevented WRCT from transmitting full-power to the East. WRCT is the only radio station under FCC regulations that can't broadcast full power unidirectionally.