Okay, I was able to confirm sergeo's statement. Here's what I did:
1.) I compiled my app with a 4-inch default image using XCode 4.4.1 with iOS 5.1 as the base SDK and ran the app in Xcode 4.4.1's iOS simulator.
2.) I copied the resulting i386 app folder from /Library/Application Support/iPhone Simulator/5.1/Applications/[app uuid] to /Library/Application Support/iPhone Simulator/6.0/Applications/
3.) I started XCode 4.5's iOS Simulator and ran my app from Spring Board.
The result? It did work. I was able to see my Xcode 4.4.1-compiled app in 4-inch display mode.
I can't say for sure if this will work on the iPhone 5 hardware, but I'd bet the answer is yes.
I guess with this finding, if you're not using any iOS 6.0 features, it may be better to continue to compile your app using Xcode 4.4.1 since that lets you more easily produce app with armv6 support.
1.) I compiled my app with a 4-inch default image using XCode 4.4.1 with iOS 5.1 as the base SDK and ran the app in Xcode 4.4.1's iOS simulator.
2.) I copied the resulting i386 app folder from /Library/Application Support/iPhone Simulator/5.1/Applications/[app uuid] to /Library/Application Support/iPhone Simulator/6.0/Applications/
3.) I started XCode 4.5's iOS Simulator and ran my app from Spring Board.
The result? It did work. I was able to see my Xcode 4.4.1-compiled app in 4-inch display mode.
I can't say for sure if this will work on the iPhone 5 hardware, but I'd bet the answer is yes.
I guess with this finding, if you're not using any iOS 6.0 features, it may be better to continue to compile your app using Xcode 4.4.1 since that lets you more easily produce app with armv6 support.