He's only played against one decent defense so far, South Carolina, and he struggled against South Carolina. Let's wait to crown him until he faces an even good defense. Being good against the USC, Nichols State, UCLA, and South Alabama defense doesn't really impress me.
And if all you had to do to evaluate QBs for the NFL was look at their completion percentage and efficiency rating, the draft would be easy. But we all know it doesn't work like that.