No.
A) That statement from Source/Pachter dubious at best, I doubt Pachter was happy with such a fail prediction, and obviously source is gonna look for ways to downplay 507k in June for 360 ...
B) This deal runs out this month AFAIK.
They'll be #1 with a price cut on kinect, they beat PS3 last xmas and with a price cut on Kinect and mass advertising it shouldn't be hard to do it again ...