Bengals are up, but they really should be up big on the Broncos. The offense looked really ugly in the 1st quarter, but looked better in the 2nd. The defense, on the other hand, has been playing some of its best ball all season, IMO. Besides a trick play (exact same play from the playoffs last season against the Steelers) and a long TD pass, the Bengals defense hasn't allowed anything.
If the Bengals O gets back to executing good ball, and there D keeps performing the way it has, the Bengals should pull away.
Oh, and they lock up a WC position if they win, which is kinda of nice, I guess.