Since when has M$ ever revealed source code? Looks like a major cave in to the evil Middle Kingdom.
Since Linux came along and started giving not only the right to view the Linux code, but the right to foreign governments to even resell it under a different name like China does when they rename and resell Red Hat Linux from the US as "Red Flag" over in China.
This was a response by Microsoft to the Linux giveaways, but only gave them peeks at it under special circumstances, sometimes even requiring a visit to Washington state to see certain portions of it. What we're seeing from the Linux crowd, is obviously a primitive attempt to divert attention away from the complete and total giveaway of Linux to the chicoms, by somehow trying to blame Microsoft for it all based on their comparatively tiny peeks instead. Ridiculous, obviously.