Apple’s iOS 7 Team in Deadline Crunch Mode, Adding Engineers:
Sources who declined to be named because they are forbidden to talk publicly about Apple’s plans tell AllThingsD that the company has been “borrowing” engineers from the OS X 10.9 team as part of an effort to double down on iOS 7. “Yes, yes — it’s essentially a repeat of the iPhone/Leopard scenario,” one source said, referring to Apple’s 2007 decision to pull engineers from OS X 10.5 to work on iPhone. “Not as much of a fire drill, though. It will ship on time.”
In my experience, the end result of this sort of last-minute scramble is usually a mess.
Perhaps someone can send a few copies of The Mythical Man-Month to Cupertino, with a Post-it note on the page that explains Brooks’ Law: “Adding manpower to a late software project makes it later.”
Ed Bott (@ wordpress.com) 
I bet it’s more of a marketing ploy to make iOS7 sound better than it will be. The article quoted even starts with “so significant”, which is probably an overstatement and very “press-release”-ish.
Not just “so significant” but a “reimagining of the mobile operating system”
That “reimagining” apparently being Apple copying the flat UI from Windows Phone and Windows 8 so that Sir Jonathan “Jony” Ive can be hailed as the new “visionary” since Tim Cook apparently hasn’t been accepted in that role.
All of this hoopla about iOS. The thing about it is that Apple is STILL going to have a consumption-based tablet and a production-based desktop. At what point is Apple going to realize that people want the OS to do both so we don’t have to carry around so many devices?