Now, who's right about visual cues and detail?
First, I doubt anyone disagrees that visual cues are the basis for all guns ACM. Without them, there can be no ACM.
So, how do YOU decide who's right?
Real simple. Go down to you local airport and LOOK at airplanes in the air. You can find the length of any runway on the internet. If you park down at the end of a 5000 foot runway and watch planes making their turn to final at the other end; you can be assured you are seeing aircraft at a little over a mile away. I think you'll be surprised at how much detail you can see even on a little Cessna 172. I think you will find aspect, closure, etc., etc., will be far, far better than AH.
Even better, go to an airshow featuring WW2 planes. These will usually be done in accurate recreations of paint job and insignia. They also tend to take place at larger airports. These airports will usually have Runway Distance Markers that show distance from the marker to the end of the runway in thousands of feet.
They look like this, which shows 3000 feet to the end of the runway.
So get to the show early and park your carcass abeam an RDM near midfield. Then watch the aircraft as they turn in on the runway enterline. You'll have a fairly accurate idea of a known distance and you can observe the detail or lack of same on actual WW2 aircraft with accurate markings.
Then you'll know who to believe.
I conducted the aforementioned experiment out over the North Atlantic in the upper 30ks. I KNOW what I saw. I KNOW what the other pilot(s) saw; I conducted this experiment more than once. My specific goal was to see just when things were observable. It was easy to start out 4-5 miles back and off to one side, add a couple of percent of power and slowly creep in on the guy ahead and above. I stand by my comments.
Take yourself down to an airport and see for yourself.