Book girls?
Female models I book for video shoots for a business I own. They are a good pulse on what young people are into as they live on their phones and do all the current social stuff like Vine, Instagram, Twitter, Facebook, blah blah type stuff. They used to be all iPhone now they have mostly switched to Android phones which I found very indicative of the current trend. I've never seen one have a Windows Phone although given that it's missing some of the important apps they use means it's not surprising. Amusingly though I usually end up being the one taking post shoot pictures because once they see the photos my Nokia 920 takes compared to their Android phones, they typically want me to retake pictures with it so they can tweet the better quality versions.
Yeah, I remember my Motorola Windows mobile 6.5 phone...I spoke into it, saying find Pho restraurants...and it actually understood Pho correctly and found me all the Pho restraurants nearby me. I was totally amazed with that back then...how time flies...Damn, now I'm feeling old.
It's amazing how many opportunities Microsoft missed due to being asleep at the wheel and/or being bogged down in politics.