I'm not sure I understand you correctly, but if I did, then almost every one of those statements is wrong:
1) Ignoring Nokia's supply issues, the Lumia 920 is available almost everywhere in the world. In only two countries (that I am aware of) is the Lumia 920 exclusive to specific carriers.
2) You can walk into almost any telecom shop in the western world and pick up the Lumia 920. Again, only in two countries is this otherwise.
3) World wide, the overwhelming majority of sales are made at the low end! Only in western continental Europe and the U.S. do high end devices make major contributions to sales volume.
A low end Windows phone will run faster & smoother than a low end Android (I had both), but in the end I still think the Android offers a better experience. It will still do most of the functions of an Android, but a Windows Phone still has the functionality limits of a Windows Phone.
Well, having a notification center is the only reason i'm not switching yet, and some apps, so yeah, WP8 is perfect, it just needs a notification center, is it really that hard? apps will come by time. I heard Blue won't bring a Notification center so untill then, i'm sticking to my iPhone.Well we all know that the apps and notification center is the big reason people *****. They are obviously fixing it.