I made an account JUST to reply for this. He has every right to be upset with Apple. He can't restore his iPad without updating it. It's one thing to lose your pin and have to lose your data, that's undesrtanadble, it's another to not be able to restore a device without updating it. If I don't have internet access I can't update an iPad I paid hundreds of dollars for? No, apple did this for a reason. Apple is currently being sued for knowngly and maliciously slowing down older devices with new updates beyond just the natural life cycle of their devices, so guess what, we have every reason to not want to update our locked devices when wiping them.
Edit: For anyone else who comes here from google to see if there is a solution, there is, though it will void your warranty. What you have to do is find an archived version of the iOS installed on your iDevice. If you don't know what version that is, find out which came with it originally, and just download all of them until when you lost access, or the latest version, and just try them all. You can manually flash iOS via itunes and it will restore your iPad to that version. Most later version of iOS do not let you downgrade, some do, though only if they are a minor revision, however if you use the one already isntalled it should work. If all else fails, at least on older devices, you can litterally use someone else's fresh backup to restore onto your device. Just a reminder that this is NOT illegal, it is your device and at least according to US law you may do anything you want to it. Apple lost that battle in court when they tried to sue indeviduals for jailbreaking iOS. The only thing they can do is void your warranty for breaking their TOS. In my opinion if you are already locked out of your device and your only option is to void your warranty or to update to an OS version that will effectively brick your device without the ability to downgrade forcing you spend more money on a device you don't need because your existing one serves your purposes just fine, the choice is a no brainer.