In Xcode 5, I use the asset catalog to manage the app icons and launch images for my app. The app icons work fine on all devices, but the launc
launching images, only will be visible on your device if you reinstall on your device
UPDATE:
There is a weird issue what I found. If you are using LaunchScreen.xib and you have images in it, you have to do the tasks above and TURN OFF your device... (seriously...). Every image will be updated in the next build.