Smartphone shootout: Which mobile OS is the biggest productivity-booster?

"Android has come a long way in terms of user experience, and could easily become an iOS killer, not only in terms of market share, but in terms of user experience -- provided that Google and Samsung truly understand where the user experience differences with Apple's platform lies."

The report has harsh word for both BlackBerry 10 and Windows Phone 8. About BlackBerry 10, it reports:

"The operating system is hampered by inconsistencies, unexpected behaviors, and user experience friction that make it frustrating to use."

It's even harder on Windows Phone 8:

"Windows Phone 8 is a strange mixture of slick, original design -- and a surprising disregard for key usability, not to mention the lacker of some key user experience features such as customization options, pervasive notifications, or quick access to key settings...Windows Phone 8 is not very competitive in terms of overall user experience."

So there you have it. When it comes to productivity, this report says, iOS 7 rules the roost, while Windows Phone 8 doesn't even rise to the level of an also-ran.

If you'd like to read the full report yourself, get it for free here.