I plan to buy a new MacBook Air during the first week of August. Is it likely that the MacBook Airs at the Apple Store will come pre-loaded with Mountain Lion by then? Or will they still have Lion and require me to upgrade? I know Apple stores carry a large stock so I'm guessing some of these laptops will still have Lion on them. I know the upgrade is free from the App Store but I'd prefer if ML came pre-installed out of the box.