Whole Offensive Playbooks are re-written.
(This is my first foray into blog-dom, so bear with my lack of polish)
Lets face it, quarterbacks that are successful in the college ranks who are very much a threat to run have not been successful trying to transition to being an NFL Quarterback. Some examples include Kordell Stewart, Michael Vick, and soon to be Tim Tebow. Each one has tried to establish their credentials with their arms and have been at times, effective, but mostly, when their running game is taken away, they are ineffective.
Why? Is the pro game that much different than major College football? Yes it is. But it isn't that defenses evolve so much more than offenses going to the pros. Pro style offenses are popping up all over the college game. Lineman are training to play before a traditional Quarterback. Offensive coordinators design plays around a traditional quarterback. Even Tight ends and Running backs are trained to block in pass protection situtations or for a traditional running play.
The Wildcat has been successful at times because the lineman were trained to the formation. they were trained to block according to who was behind them. Their mindset was changed and established during training camp for this. It was best used though sparingly as the element of surprise offsets some of the offensive line's inexperience in blocking for an offense that is designed to run first and use pass as a secondary option.
Well.. I said the "O" word. Option. In order for a team to successfully draft and implement a "Running" quarterback, they would need to redesign the offense from the line up. It would take 2-3 years of drafting lineman tooled to play a mobile offensive front with pass being the secondary option on every play. Good mobility of the line (sorry fans of the 320+ lineman) re-focusing the objective of every play, and redeigning the playbook around the run first, pass second offense would change the way people look at the running quarterback. And understand, this is different than a team who is successful with rushing being their primary offense. It means that every time the quarterback touched the ball, he would be a threat to run for gains. But his secondary threat would be passing. You still would have a rushing offense based on quickness.
Tebow will go early (maybe not first round) but he won't be successful unless people re-think their game plans.