Like socialcarpet, I recommend phones that might actually suit said people rather than try to push WP to everyone regardless of what they want and need.
That is also what I did with the N8. I was amongst the first to get one and people were asking me online if they should get it and it's not one or two times I recommended people iPhones or Android devices based on what they told me their needs were.
I also often use this analogy of WP sorta being in the middle. iOS is fairly fast and fluid and easy to use, but not capable of overly much in the end. Android then again is capable of a lot, but comes at the cost of user experience and few other things (performance, security...). WP then again may not be as bling as iOS (depends, I frankly think iOS to be quite terrible, but it has its charms I gues) or as capable as Android, but it is far more user intuitive and fluider than Android, while not being quite as handicapped as iOS. So if people say they want to be able to do it all on their phones, I often recommend Android (except if they emphasise stuff like Office and Exchange). If they want basically an entertainment device first and mobile phone second and dont care for much than apps, I might recommend iOS.
Naturally I like to promote WP when possible, but I don't do it when it's clear it's not what the person wants or needs.