Hoping to rebound from their tough divisional loss to the Giants, the Cowboys stayed at home for a Week 3 Monday night duel with the Carolina Panthers.  After a scoreless first quarter, Dallas trailed in the second quarter as Panthers quarterback Jake Delhomme completed a 25-yard touchdown pass to tight end Dante Rosario.  The Cowboys took control in the third quarter as kicker Nick Folk nailed a 24-yard field goal, followed by running back Tashard Choice getting a 5-yard touchdown run.  Dallas pulled away with Folk's 19-yard field goal and cornerback Terence Newman returning an interception 27 yards for a touchdown (with Choice getting the 2-point conversion run).
Question: How many more wins did the Texans have in their AFC South title season over the previous season?
Answer: 4