Agreed but that would be a different evaluation all together. This was only an evaluation of tip design and their ability to penetrate the same medium at the same speed and under the same conditions. Ballistic gel tests are pretty interesting but they have their limitations. The main one being the pinch friction and lack of lubrication. Game animals with all their blood and other fluids are very self lubricating and the tissue opens up when cut. Those two factors are sort of opposite gel. The gel works good with bullets which kill in a different manner than broadheads. Ive often thought a more applicable alternative to gel (for broadheads) would be many stretched panels of rubber (like rubber gloves are made of) one after another with a small spacing between them.

Ive seen guys shooting through many water filled milk jugs lined up in a row to see how many jugs they penetrated.