MS has likely moved all available initial 360 S inventory since it sounds like many retail outlets have been receiving limited shipments (which are selling out).
While most of those are likely going to current 360 owners, it doesn't really matter for the purpose of hardware tracking; these are still new units being sold at retail.
What may have an even greater effect on the 360 hardware numbers over the next few weeks is the availability of the discontinued and discounted SKUs. $149 and $249 are both excellent values for those new to the current console generation.
The question is how much inventory is remaining for the current Arcade and Elite.
The next big boost once inventory levels are depleted will be from the launch of Kinect, which will undoubtedly be effected by the final bundle MSRPs.
