Does anyone know if there is a new Windows 10 Preview Build or patch deployed today?

[WPCentral Question]

I have been running Windows 10 Mobile Preview 10572 for a few days since 10/21. Today I took an update that did not change the build number but kicked off a reboot and migration.

 

[pankaj981]

It could be the Insider Fast Configuration update, not a new build.