Here's an example of inconsistency from the the very article under discussion:
Why did Android and Windows Phone move away from photorealistic buttons? "partly just for differentiation’s sake".
Why did Apple (eventually) do the same:
"... we’ve grown up. We don’t require hand-holding to tell us what to click or tap. Interactivity is a matter of invitation, and physical cues are only one specific type. iOS 7 is an iOS for a more mature consumer, who understands that digital surfaces are interactive, and who doesn’t want anything getting in the way of their content."
Got that, this is the way forward, it's the right thing to do, it's better than what iOS < 7 was doing, and it broadly reflects design trends in other fields like the web but we can't quite bring ourselves to admit that the competition might actually be able to hire a random interface designer that is aware of this. No, they have to accidentally stumble into a better way to do interfaces just because they were trying so hard to look different from iOS6.
This childish sophistry is SOP for Apple blogs, it's the number one reason I (someone who adopted OSX and iPods as soon as they were available) think the Apple-sphere is mentally diseased and worth distancing yourself from.