True, but that is exactly the sort of thing you see with first time starters at QB, especially, in Jarren's case, one who never even got any real mop-up duty in the past either. So he went into a huge, primetime rivalry game against a good, aggressive defense, and a weak O-line, with basically zero game experience.
Given that, and how he did perform, even with his many mistakes, I'm very confident in his abilities. I expect the game will slow down for him as he gets some more experience and confidence. A week off to work on mistakes, a test against UNC, and then two weeks of playing cupcakes to hone his skills and continue to grow more comfortable with the offense and the speed of the game, and he should be ready to take on the meat of the ACC schedule coming up after that. He has the potential to be a very good QB.