I'm not sure on this. JT is about the same size as Tracy Ham was at GSU and he survived two seasons of pounding successfully.
I think the key here is speed and creating enough uncertainty about what you are going to do. One of Vad's problems this year is that, since he couldn't run the TO efficiently, it was a lot easier for teams to square up on him and land a lick. Their D puzzle, iow, was simplified greatly and made setting up less of a problem. If JT (or whoever) can run the O correctly and we continue to get the passing game into the O (I hope, I hope) I won't be that disturbed about our QBs being hit out of the games.
For all that, it would be nice for JT to put on 10 lbs or so, just to be on the safe side.
You should look at old GSU film with Tracy Ham. Ham wasn't the tallest guy, probably a true 5'11, but he was a solidly built guy around 190-200lbs. JT is listed at 5'11, but I've stood next to him on field level and he's more 5'9 than 5'11. On top of that, he's not that well built. The good thing is, if a QB is smart about the hits he takes, think Tevin's career, then he won't take those knockout shots that Vad and Nesbitt took.
The one thing JT does have is elite speed and quickness for a QB. I'm not sure that means too much against upper tier teams on our schedule like UGA/Miami/VT/FSU because they have defenders every bit as fast as him, but against the other teams we should be fine. I'm more worried about getting those 2-3 yards through a defender that we'll need every now and again to keep the chains moving.
We'll see in 2014.