[youtube]http://www.youtube.com/watch?v=FYCYyTgXKQo[/youtube]
In iOS 5, Apple implemented a system for its iDevices OTA update which allows users to install delta updates for iOS directly from your own iDevices. These delta updates are basically versions of iOS that contain only the files modified by Apple Lossless Audio CODEC (ALAC), and not the entire version of the operating system. Normally, iTunes downloads the entire iOS when updating an iDevice, but the new OTA system downloads only the modified iOS files and not the entire operating system, the update procedure being shorter, simpler and faster.
Based on this theory a brazilian blog claims that in iOS 6 Apple intends to do the same for applications. In the video clip above, we are shown that the Podcasts application of iOS is installed faster on iOS 6 than on iOS 5.1.1 and it is speculated that only a delta update of the application was installed in iOS 6 and not the entire application. To be honest, I noticed that all applications install faster in iOS 6, but none of them had an installation/update process that fast. What we see in the clip could be a difference in the speed of the two Wi-Fi networks to which the iDevices are connected or a test made by Apple for a system of delta updates for applications.
Of course, developers will have to learn about this delta update for the system to work for all applications, but maybe Apple will talk about this in the fall when it releases iOS 6.
