There are a few people I work with who have WP devices. One is a sister-in-law to a Microsoft employee, so I don't really count her. Another has a Focus, and has had it for a while, and likes it. Another guy bought a 920 on launch day, but took it back because he hated it (he's a guy very resistant to change), and went back to his Virus Phone.
At my church, though, there are 10 or 12 people with WP devices if you count my wife and myself. There have been two who switched from WP to iPhone (and I don't preach against iPhone like I do Android Virus Phone). There is one who hates her Focus (she's one of those people who won't give you a chance to show her how to make it do what she wants it to do) and is going to get an iPhone. But other than her, the rest who have WP (which is probably more than 10% of the church), love it. One of the ones who switched to iPhone loved her Focus, but switched because her in-laws got iPhones and they wanted to do Face Time.