The tests are very hard to evaluate not knowing enough about the test equipment and other factors in the entire experiment. I would guess that there is no significant difference in many cases to justify certain preconceived notions. But then these are self evident in the data.

Kodak probably used D76 straight with Nitrogen burst agitation. The agitation at the start would be accompanied by hand agitation at the start to dislodge any bubbles. Otherwise, the agitation would follow that in the EK guidelines for time and quantity. The use of gas burst allows an exact setting for time, duration and pressure.