I agree on all points.
However there seems to be hints that indicate that there IS something going on in the DPF beyond filtration. Like I said, I wish FORD would expand on this in the literature, but in reality I guess "we" don't need to know.
I will say that when you look at the entire system it is amazing how clean the result is. Could you have imagined this 20 years ago?
AND, there is no need to concede my friend, this is a discussion, not an argument.