I have installed the GM of Xcode 4.5 and there is an option in the .xib and storyboards Attributes Inspector (under 'Simulated Metrics') for choosing between 'Retina 3.5 Full Screen' and 'Retina 4 Full Screen'. If I choose Retina 4, adapt the interface and run it on my 3.5" device, the UI elements are in the positions for the 4" screen. Is there a way to use the same xib for a screen in the app and have it adapt depending on the screen size?