The truth is there are big questions about both QBs. JG had no blocking last year, so really hard to evaluate (especially as a RS Freshman). He has a strong arm and mobility, but we don't know how he's progressed. It's really hard to look poised and produce at the QB position if you're running for your life every play. Most fans don't realize that. No protection = panic/erratic QB play.
At the same time, Chryst was a suitable starter for Stanford but he got beat out by more talent. He has experience with a good Stanford team that relies heavily on the run game, but he's never taken a snap for Tennessee. We'll see. Whoever the coaches roll out proved in practice they give us the best chance to win. It's a new year. The QB starter deserves a fresh start from fans...whoever it is.