I'am from germany, yes. But when you read the post from jroegner he testet with an old iOS Version and there Push Mail works. So it could also be an iOS Problem and not a Patent Problem.
My setup (osx lion server + iPhone's, iPad with iOS 6.0 and iOS 6.0.1) works fine inclusive push. But since last week, I haven't make an upgrade on any device, all iOS devices are without mail push functions.
Since last week are more providers (aol...) without push function. Unfortunately I haven't iOS 4 or iOS 5 devices for testing.
I think there is no bug in iOS 6. Perhaps, use iOS 4 push server without geo- / ip- restrictions?
A statement from apple would be great.