Stop me if you have heard this one: so, a Microsoft Developer Evangelist walks into an AT&T Store and asks to see their Windows Phones. Which phone gets recommended?
Since time immemorial, the recurring trend is this: people like what they know and recommend what they like. This is true with cultures, languages, religions, movies, washing machines, and mobile phones.
Customers buy IPhones when the salesperson carries an IPhone, Androids when the salesperson carries an Android, and Windows Phones when the salesperson carries a Windows Phone (or remains silent).