I took a brief look at the test, and I would just add that arrow charts do not necessarily provide the exact correct arrow for the situation. What I'm saying is that an arrow chart should get you close, but not necessarily right on. For example, the proper spined (after personally tuning) arrow for my Darton is a 2216, however, if you look at a chart, this would be a very weak arrow for the setup. Now I believe this is due to the level nock travel, and the fact that I am shooting it at the exact centershot of the bow. But the chart will not even show a 2216 as an arrow to use. Longbow and recurve charts are not even close, I use a chart from a traditional website for that, and even then I have to experiment.

I can't say for sure whether the arrow they used was right or wrong, but I wouldn't use a chart for the "end all" descision on what size to use.