I'm not sure where you got your information, but perhaps you can have a look here Phone Finder results - GSMArena.com
36 phones total from Nokia all running Windows.
The problem with Nokia was timing and the dumb .... that sold the company to MS.
Yangstax. If that leak is the real thing and it does get a Windows ROM. I am sure Windows mobile fans all over the world with enough cash will be streaming to the doors, banging and calling out "Please take my money!"