It seems like you're referring to the visual style, but I think the comment you were replying to was about the structure and behavior more than mere skinning, and about differences that far predate iOS 7. There's a reason the term is "look and feel", not just "look"; that second half is where Apple so often distinguishes itself.
No. I'm not referring to the visual style alone. Microsoft didn't just do flat UI to be cool. There was a purpose behind it to focus on content first, the same thing literally is being preached by Apple. Apple just executed better when it came down to it but they definitely borrowed many ideas from both Android and MS in terms of interaction alone.
