Something going on worldwide happened to me early in the morning on October 16th, 2012.  My home computer, running Windows 7, rebooted after receiving an update via Windows Update.  After rebooting, it was using KMDF 1.11, and UMDF 1.11 (the versions that are inbox with Windows 8), rather than 1.9- the version that was part of Windows 7.

Yes, WDF is now updated automatically by Windows Update on Windows 7 (now) and Windows Vista (expect that to begin next month) machines. I'm not going to say much more about it- other than that I've been waiting for it for a long time, so I'm glad to finally see it actually happening.