I think Sims is talent, and he'll be a solid quarterback at BAMA. One thing that we witnessed yesterday was a lack of experience IMHO. Practices and scrimmages just are not the same as the real thing and I think it showed with Sims.
If I had to bet, my money would be on McCarron as the starter for the rest of the season. I think Sims gets some meaningful p.t. this weekend, but if he doesn't really impress, I think the qb controversy is effectively over.