I was browsing the net as usual when I stumbled upon http://www.microsoft.com/mscorp/facts/default.asp the info on that page. Halfway down or so it goes "Upgrade to
Perhaps the lower costs in Microsoft's estimates come from a weekly hurricane followed by exploding [Dell] servers for no apparent reason, followed by volcano-like tectonic plate movement at the server site.
Regardless of whether a mission expands or contracts, administrative overhead continues to grow at a steady rate.