Good survey
Glad to see that all this hype on Win7 was just that, sales, marketing, hype, whatever. 100% XP still here. People forget that its not just Office and XP at play here, my org alone is several hundreds of apps that have BEEN working, as long as we stay on XP. There are many that already dont work on W7, and require the vendors to update their software, in order to work on W7.
This change wont happen overnight, specially not for government. For home, we all know thats already happening.