Originally Posted by jstevewhite 
I'm not disagreeing with your post, I'm just pointing out that there are gotchas in there that make it impossible to remove the contentiousness from this topic.
This thread was opened by somebody who was completely misled as probably is the majority of people discussing the topic.
So, this thread was opened as "DoF for beginners". And I think we already made good progress here.
Your post clearly belongs into category "DoF, advanced topics".
I don't disagree with what you have written. I am just not sure that it helps to grasp the very idea what DoF actually means.