Is there any credible source that can confirm this?
There's no JIT for Apps on iPhone, don't think it's allowed on Android, Blackberry or Windows Phone 8. The underlying App execution system does usually use a JIT engine but you can't embed your own to run LUA/Python/etc within your own Apps.
That information might be old as I haven't involved in mobile development for a while. That's the basic gist of why you can't have a for of JIT for emulators etc.