I don't know, I watched a lot of Purdy's college games on the tube and was never very impressed. His first year as a starter he simply threw a lot of 'toss up' balls to several tall WRs and more often than not they came down with the ball and made great catches. His last 2 years at ISU, I don't know his stats, but he seemed very inconsistent to me, which is somewhat confirmed by his team's record those two years.
All those 7 things listed above certainly didn't show up when he played against a stout Iowa defense for 3 years.
I tend to think his initial success now is more because of the 49ers offensive system, which doesn't require a rocket scientist -- it's why they can plug and play multiple QBs which have been successful.
I see him as a long-term backup in the NFL, if that. Has any other player chosen last in an NFL draft gone on to be starting QB without injury to the QBs ahead of him on the depth chart? If he's the first, it would be an amazing accomplishment.