so I'll put in terms regular people can understand. I just came from an Apple store where I was playing with a demo unit. So I pulled out my iPhone 4 and lined the phones up side by side. I tapped Settings on mine. Then 3 seconds later I tapped Settings on the iPhone 5, the i5 was already loaded and mine loaded 2-3 seconds after. Even with a 3 second head start, that is fast!