My observation, purely from reading posts here over the years, is that the majority of our members use non-testing methods to choose arrows for their bows, such as spine calculators, recommendations of friends and vendors, and just watching the arrow flight. A smaller, but still significant group, uses bare shaft testing. A still smaller group uses paper testing.
I personally use bare shaft testing with one bare shaft, as I learned it from Ken Beck of Black Widow Bows. I understand it and it has worked well for me for many bow/arrow combinations over many years. It does require a certain consistency of form to get consistent results. I don't use EFOC weighted arrows, but from reports I have read on here, I get the idea that bare shaft testing might not work as well with EFOC as with a more normally balanced arrow.