[drinchev]

Well you can never tell this, until you see it on your phone. Most of the icons may look like a basic photoshop tutorial, but still that's the minimalistic approach of flat design.

You've got a really different view of something ( a gradient ) outside of it context ( the whole UI ) and the same element as part of a whole design. That wasn't pretty obvious to the great super-pixel-detailed skeuromorphic design, where each icon was a whole design, but I'm pretty sure we'll speak differently by the end of the year when we get that iOS and evaluate the change for real.

Take a look at their new demo paga [1] it looks pretty nice and flattened. I'm afraid of what will happen to the 3rd party apps, that will not get a flat-design update.

[1] : http://www.apple.com/ios/ios7/

[andrewmunsell]

Even looking at their site, the mail icon drives me nuts. Personally, I don't like the cyan-to-blue because it looks odd that the gradient shifts so dramatically in hue. The Twitter icon, on the other hand, is fine because it's not really a shift in hue but in lightness.