I know that is the current reading but I am old enough to remember when it was the depth from the face of the framing to the wire, no matter how far it was away. I think the invention of the "stacker" prompted the changing of the reading.
If you look at a house built in Florida before the 90s you will see EMT coming down a masonry wall when it is furred and dry walled. I always thought that was the right way to do it.
If you don't agree, think about that homeowner hanging a picture while he is barefoot on that terrazzo floor.
