It took about 20 min for me then I got an error saying cant back up ipad from restore,so I tried again,no luck 2nd time. I checked the iPad and the thing is completely wiped clean, so its back to the drawing board to what happened. When I tried to open the ipad it said do you want to restore from Itunes or start new,I selected from iTunes so that is where I am right now trying to restore again before loading IOS 5. I have another ipad to do plus a ipod and Iphone, I hope Im not in for a lot of trouble.