Any one interested in the oiling mods I did?

If you sealed the unnessesary passages I do not see how the test could not be valid. A hose say right at the rear galley port would simulate the location of the large volume of oil from the pump.
I don't know the details of the test, just the basis of how Atherton
Determine the unequal flow. To me it jives with my dash example.
A long galley opened at the far end, and the large volume of air or oil at the other tends to run right by the nearest passage to the pump until restricted down stream.

I don't know how the "test" was done, so I can only speculate, and if flown was simply being observed then I don't see how the proper passages could be plugged, since a crank has to be in a block for the passages to operate properly.

Your dash example is with air, air is compressible and the relative flow rate to cross section is entirely different.

An open passage would basically have the oil feed pressure dropping to zero, just like when cam bearings are toast. In that case velocity WILL dominate and momentum comes into play. However, working clearances in an oil system should never let pressure drop to zero. That's the big difference. If pressure is actually present in the primary galley, then velocity will not rob a passage of flow. It is possible to lose pressure in that galley though for a variety of reasons, but that does not mean the fix is to reduce velocity, it's to plug the hemmorage wherever it's happening! LOL