I thought I would try some of the basic features out in a simple test app. However with the attached mfa, it seems to be extremely slow on my iPhone 4 and in the simulator. I would say that it runs at about 10 FPS on my phone. The game also crashed the first couple of times I ran it. (The splash screen came up then immediately disappeared). And then oddly enough I left it a while and tried running it again through XCode, but to build to my iPhone, and it worked.
I put in a quick backdrop so that I could see if the game was using the higher resolution. If you look at the attached screenshot that I took with my phone you can see that it does appear to be 640x960. The background however is red on my device where as in the mfa it's only made up of black and white pixels.
In the mfa, the background is not covering the whole app, yet on the device it is.
The button and edit box don't show up at all.
Perhaps it is all a scaling issue? I noticed in another thread it was mentioned that iPhone 3 resolution images are made of all of the objects, as well as iPhone 4 resolution images. Is that handled when the game is compiled? Or is there realtime scaling going on as well?