Might I suggest that the first signs of the GFS really being on the money might be a deepening of the system as it's convection hits the Atlantic which is what the GFS kept showing over and over. Well, it showed a few things but basically it wrapped up more after it exited South Florida than in the Gulf.

Something we might see play out. Worth looking for... as it will say a lot as to the forecast down the line.

Other than the forecast of her being anchored for days...

http://www.ssd.noaa.gov/goes/east/gmex/flash-avn.html

I'd watch that and the funktop for any signs of that odd part of the forecast playing out. Because, if it does play out I believe the system could slide up along the coast with one model showing it coming very close to the Outer Banks.