I should add from my experience.
I went to my carrier's store to view the Windows 7 phone. The salesman immediately tried to get me to by a Droid. I told him I was thinking Win 7 phone, or an iPhone, and he didn't want me to see either one.
Most of his income is from commissions, and he only gets the better bonus if he sells Droids.
So I went to the Microsoft Store and they showed me the phone !
I have sent many people ( clients ) to consider the Windows phone because soon they may be able to use it to do some work with my software. Every time, the sales people pushed them to the Droids ! I don't work with Droids, so they lose.
I have many friends who bought droids, and then dumped them, either for a newer phone that could run current apps, or because they disliked them so much.
So why do they have the sales figures ? Because the sales people push them on customers who really don't know any better.
Apple has 98 % loyalty with iPhones. Windows 7 has 98% loyalty with their users. These figures are from studies conducted here. Droid loyalty ? Not so much. Droid users are always looking to find something else. Apple users only upgrade to new iphones when released. Windows users are waiting for the Win 8 phones. Droid users ... well they are looking for alternatives.
Have you actually used a Windows phone for any long period of time ? I've had mine about a year, and I've never been happier with a phone. I bought my wife an iPhone and she has never been happier ! In my extended family, and friends, no one owns a droid ! Some did, but no more !