Finally... but why did it take MS so long to provide feedback on this? MS really needs to lift its game in this area.
As far as Cyan is concerned... they are still at the mercy of the carriers to actually release it.
My own carrier (Telstra Aus) is the nation's largest, and yet they apparently only have 4 people working in their "testing" department. Given the work-load they are inevitably under, it's little wonder that WP scores low priority. They have been "testing" it now for over a month, and still haven't scheduled a release date.
MS needs to find a way to cut the carriers out of the loop, and do the certification testing for them, so they only need to rubber-stamp the results, and protect themselves from being held to ransom by these hold-ups in releases.