The number is for 1Q 2012, so it has been available from some time, at least in europe. The Lumia 710 was available in the US. China was missing though. I think whether it gains momentum or not depends on lumia 900 sales in the US. I guess they will have at least 5% market share til the end of the year. If nokia survives it Won't be easy though since apollo is late and the galaxy3 will make the 900 look like childs play.