Bad science, BS experiment and false conclusions.
Linear velocity of particles, tortuosity of flow, surface area of the media (pleat count is irrelevant), and particle density were totally ignored. Aerodynamic behavior of particles suspended in air is very different than dumping them on the filter surface.
The only part they got right was the air velocity and pressure drop across the filter media.
You can completely ignore the acceleration test since they didn’t mention resetting the computer system to base line before and after each test. The system adaptive controls adjust the system for current conditions and therefore during the next test when the conditions change, the system hasn’t been allowed to adapt to it. An increase in air flow will cause a leaning out of the A/F ratio giving a false performance increase that disappears after the adaptive parameter adjustment catches up.
Either reset the system to baseline or drive for 30 minutes using a variable acceleration protocol after each filter change to allow the system to adapt.
