Its looking increasingly likley that this will be a cuircit that the F-Duct may be one where it just isnt enough of an advantage to run. McLaren and Sauber arnt running it, i sence many other teams wont run it as well.
I will say this, i expect to see many of the new teams be closer to the front at Monza as they inherently run less downforce anyways. Id expect to see Virgin and HRT to run really close to the midfeild, but it depends on their relyability.
Im expecting a shock here, but setup time will be just on the Saturday morning, as theres showers expected for the Friday:
http://uk.weather.com/weather/10day-Monza-ITXX0049