It's kind of like a "go with the devil you know" situation a little bit. Palmer clearly isn't starter material based on his moving around the league (and even playing arena football for a year) and doesn't have any NFL stats or game tape to show that he CAN even be good. But neither does Thad.
But my choice would still be Palmer because, I'm not planning on him being the starter anyway and since Thad was looking the way he did all summer, a look at someone else is good by me. Plus, I'm sure he's picked up something (football knowledge not physical attributes) from his brother Carson.
Plus his name is Jordan. I mean come on. Jordan!