I don't know if I would call it great, and I would argue that it wasn't much of an improvement (if any) over his rookie year.
He dropped in most stat categories, but improved his interception from 17 to 12, but then doubled his fumbles from 5 to 10. Going from 35 TDs to 27 TDs is a pretty substantial drop as well...factor in that his completion % dropped 3 points, etc.
He had a long sophomore slump to start the year, and finished strong, but ESPN's subjective TQBR rates him lower in 2012 than his rookie year.