I have been using Windows Phone 7 since July 2010 and can say without a doubt that Windows Phone 7 has been the most stable and reliable mobile phone operating system I have ever used
Out of the six modern smartphone operating systems, Android is clearly the least stable of them all.
Etc.
The only thing clear to me from this article is that this guy is not a very good journalist. Wild sweeping claims with no real work to back it up.