bill - 8:47 am on May 17, 2013 (gmt 0)
I asked some guys with Enterprise licenses for Microsoft products and they said they simply tick another CAL off their list when they image a new PC with whatever version of Windows they want. There's no downgrade from Windows 8 involved at all. That would make these numbers a bit more fuzzy.
I certainly understand the reasons for an IT dept. to downgrade for the sake of uniformity. However, it is also quite common for businesses large enough to have an IT dept. to wait until SP1 of whatever version of Windows is current before upgrading. "Blue" is essentially Windows 8 SP1. After it is released and tested you'll have a better idea of corporate uptake.