If those teams had identified Gabbert as a franchise QB, one of them would have drafted him. The QB trumps all. In my opinion, some people were impressed by Gabbert's potential when he threw the ball in shorts without a defense around him. Nice performance at the combine. On his pro day it was like "wow". On the field? UDFA Chase Daniel threw 72 TD passes in his final two seasons at Missouri, while Gabbert threw 40.
And then we can add the shaky pocket presence that was overlooked. I think Gabbert was a project because of his wacky offense, his age, inconsistent accuracy and lack of toughness in the pocket. He has the physical tools, but Brady Quinn also has all the physical tools. They need something more when the bullets are flying.