From Europe looking at online stores and "top 20" kind of stuff. Not very accurate, I know, but the big picture is good enough.

Big picture: N9 is going down rapidly, N8 is very much alive and Lumia 800 is selling well. The E7 is stone dead, and so are pretty much all the other Nokia smartphones, more so than the N9. The price of the N9 is being cut, and that helps, but it's too little too late. No one writes apps for it anymore. There may still be life, but I am not very optimistic, time is going too fast, and it is already old.

Besides Swipe UI has proven to be more annoying than pleasant. A concept that works well on paper, looks nice for shows, but is clumsy in real life. Strap Belle UI in the N9, and people might actually like it.