Should Windows Phone OEMs even be focussing on high value flagship products. Engadget doesn't think so.

http://www.engadget.com/2013/02/15/rethinking-the-flagship-nokia-lumia-620/

It certainly makes some good points. I guess the key question is how much do these flagship devices drive mass market adoption (which, with the exception of Apple, will probably not happen to the flagships themselves)?