I've never preordered an Apple device before and I'm wondering how it works. Is it usually better to preorder for shipping to home or to pick up in store? I have several Apple stores nearby - would I likely be able to pick it up sooner at one of them, or by having it shipped to my home? I can see pluses and minuses both ways - the stores get regular shipments, and I could pick it up the day I get notified, but the stores only receive X amount, so I could have to wait until they receive their second or third or... shipment. On the other hand, the warehouses handling mail shipments should have much bigger supplies - but a much bigger number to ship out. Anyone with real world experience?