Nope. I will.

From Barracuda:
Hello Phil,
I have send out an internal e-mail to our product manager, here is the body of the e-mail:I have send out an internal e-mail to...

Folks,
Thanks for the good words, I agree Testing, there is no substitute. I have contacted Barracuda support and they have confirmed their docs are unclear.
In this particular case,...

Sigh, I think I answered my own question. This document clarifies VSS: https://msdn.microsoft.com/en-us/library/cc966520.aspx
This gif cements it, seems to me the only activity in SQL server is the IO is frozen...