It is obvious that Urban Meyer and Florida's medical staff won't make a decision about Tim Tebow's status until late next week -- perhaps even gameday.
John Brantley's dad has the same idea, per the Orlando Sentinel: "I wouldn't be surprised if they take it all the way until game time."
The primary reason is, of course, it will be tough enough to figure out Tebow's readiness in the full 14 days from the concussion, let alone a moment sooner.
The secondary reason is strategic: It wouldn't do Florida any good to reveal to LSU which QB will be playing -- the systems they run will be distinct, so why not make LSU burn limited practice time prepping for an offensive set they won't see?
I stick by my assessment: For all his inexperience, John Brantley is exceptionally talented -- when combined with UF's defense, RBs and special teams, Brantley is talented enough to lead the Gators to a win. (Yes: Even on the road at LSU, something that not even Tebow has done.)
That's all he needs to be: Good enough. That's how good the rest of the team is.