The 12Z GFDL is quite a bit deeper with Wilma, bringing it down below 950 mb over the Gulf and around 950 mb at landfall. However, it shows fairly rapid deepening right away, forecasting the pressure to already be down to 947 mb by 18Z today (about right now), and that simply hasn't happened yet. The satellite presentation is still unimpressive and based on the recon it is still struggling to hold its own. The large outer eyewall and concentric eyewall structure is typically not associated with systems that intensify very rapidly. Some slow deepening is still possible in the storm' s current configuration, but even that has not happened yet.