i believe it's a mere speculation of how many Lumia 920/820 & HTC 8X/8S have been sold. being conventionally 2.x% of market share for WP7 & if the reports of sold-outs are true because of its popularity (unlikely, due to some Nokia stronghold markets like Singapore & HongKong have plenty of stocks), it could be well over a million by now since most of them only sold before X'mas.
http://bgr.com/2012/12/19/nokia-lumia-9 ... sis-259684
http://bgr.com/2012/12/04/mobile-market ... 12-android
http://bgr.com/2013/01/02/android-ios-a ... 012-279464
isn't BB version already available even though it's not even 5% of the market? i don't think Waze would need to wait for 10% market share but rather once it's doubled, the significance of WP client is worth developing for... ::fingers-crossed:: i really wanna get rid of my old Android since Lumia 920 will be my main phone & Waze is the only reason i keep that old Android (just to contribute to the traffic info, GPS on Android phones are slower than Nokia somehow) or I should tether my PV808 with Waze although Nokia Drive is still preferred for navigation.