Well that should at least give us some hope. It's purely related to the OS, which I somehow always expected, but I thought the algorithm for it was rooted on a much "closer" level to the hardware. Since I've only heard people with the 6 and 6 Plus mention this issue, I naturally assumed it was only restricted to those phones.
Thanks for clearing it up!
I wonder if the few complaints about the lack of dynamic range (compared to the 5S) on the 6 devices is also something purely related to software?
I wish that was the case but I've seen shots of all devices ranging from the 5 to the 6 + running iOS 8+ and they all have a very heavy noise reduction algorithm that's been applied to them.
Maybe I'm imagining things but with iOS 8.1.3 it seems like the noise reduction was toned down just a bit? I was hoping picture quality would go back to iOS 7 quality but that hasn't been the case yet.