imo, it's kind of like the whole pre-draft newton discussion. he had pretty much everything you could want in a franchise QB, except experience in a "pro-style" system. what we saw, though, was that he was quite capable of handling anything throw his way
"pro-style" is a very overrated mindset and is starting to see a decline in usage at the pro level. there is no true system that is the official system of the NFL. QBs spend more time in the shotgun than ever before and many teams are using the spread and are incredibly successful with it. the game is changing...again. the mark of a great coach is being able to adapt what he does to the personnel he has and to what will make the team competitive. imo, what i've seen from chip kelly makes him no less capable of doing that than any other perspective coach the team might hire.
i think the pro-game is evolving and it's starting to look more and more like college than college will be looking like the pros. i'd rather find someone on the front end of that than on the back end which would be some old school "pro-style" HC.
Pro-style isn't overrated and it isn't going to decline. If you didn't know, shotgun formations are a part of the "pro-style".
The reason you want a QB to play in a pro style offense is because obviously the transition will be made easier. Its hard for a QB like Newton to get used to being under center because he is used to always facing the defense which makes it easier on him to make the reads as he can see the whole play develop. Defensive pre-reads make or break a QB in the NFL, and option offenses do not promote any kind of pre-reads.
Its nice to see the zone read plays every once in a while but we are shooting ourselves in the foot by making it our base offense. Chip even knows he wouldn't dare use the offense he has in Oregon, in the NFL. The difference in the range of speed from college to NFL becomes minimal, and with that goes the only thing that makes the zone read successful [assuming proper execution].