The key to a great QB is IT. IT is confidence, poise,swagger, and leadership. Vince Young has IT. David Carr doesn't. Carr plays scared. Vince plays expecting to win. Do you think its just magic that the Titans are 0-3 without Vince and 6-4 with Vince. Sure Carr has better mechanics, good athletism, and good speed. Sure on paper and in practice he looks good. But he doesn't have IT. Vince does. The Texans made a mistake. I do believe that Mario will be a great player in the NFL but Vince Young is a SUPERSTAR. Other QBs with IT are Tom Brady, Carson Palmer, Donovan McNabb, Brett Farve, John Elway to name just a few. Players without are Jake Plummer, David Carr, and I hate to say it, but Peyton Manning.