You completely missed the point on Delhomme, but okay.
Yeah Sanchez. How about David Carr? Matt Cassell? Brady Quinn? Jason Campbell? Vince Young?
These guys aren't NFL starters or franchise QBs and teams tried to force (or hope) them to work. For the past three-five years you've known almost from the first game a rookie QB plays whether or not they've got the stuff to be a franchise QB. It's a pass happy/friendly league now.
Gabbert has shown me (and undoubtedly his coaches) anything that says he's a starter in the NFL in 1.5+ seasons.
The Jags will take a QB next April.