Actually I do believe that sales for WP7 are "satisfactory". But it won't last long. Hard core windows mobile/phone, just like me, got their device, there's not much press about "latest and greatest" OS from MS. And what ever happened to the update, that I keep hearing about?
Bottom line: MS playing catch up game as usual, When competition, s.a. Apple and Android already introduced video calling on their devices, Apple working on payment system, MS still straggles with copy/paste and forget about multitasking! That's like couple years behind. I did have high hopes for WP7, now I can say, I am very disappointed!
You create your opportunities by asking for them