Yeah i wouldnt put my future, not even a years time, into any of those three QB's at this point.
Palmers age, not nessecarily his production, being the prohibiting factor. Kolb comes with question marks about consistency and game management, and Flynn is still the guy that had 1 great game.
Besides, Flynn went to the Raiders, when's the last time they actually made a good decision? He's jinxed before he can even get started.
IMO, all three teams would be wise to consider a QB...but to your point, that doesnt mean they will if they dont like the QB class.