Everything with a modern design is not a copy of Metro. Windows wasn't the first to do flat designs, and most designs (like this) that people say look like metro don't resemble it.
I'm not saying Apple hasn't improved the concept with gradients, shadows etc, but denying that Metro was a big influence on the iOS redesign is just unrealistic.
The iOS7 design is about layering, transparency and minimalism. WM7 is far more about its distinctive rectangular, high contrast design.
I'm not denying that there are differences; what I'm saying is that any Joe Average, asked whether iOS7 looks like Metro or iOS6 or any other OS before them, would say Metro.
There is nothing wrong in admitting influences in art, complete originality is a just a silly myth.
The icons themselves are mostly flat with some exceptions (Contacts has a very strong bevel and there is a slight bevel on the notes icon).
There are also some interesting use of solid color to indicate interactable elements (icons or links that are part of the UI are in the same solid color) that will be greyed out when there are layer above it (e.g. via action sheet).
Most of these are not in the iCloud website, however. And I'm still not sure I like the new visual style.