My feeling is that blind test done years ago is somewhat meaningless if all the cues had their own shafts on them.
It just would show who's cue you like the feel of, not what joint was better.
Not sure it's actually possible to say one joint is better than another with all the other variables.
The only possible way might be for a carbon cue maker to make a full carbon cue in different joints, but even then there would be different weight ballances and feel.
Then again top cue makers have their preferences, but that still doesn't mean one is better.
I have Schons in 5/16x14, Jacobys in radial, Mcdermots in 3/8x10, and a DZ in 3/8x10 modified and am just getting started in making cues and will probably do 3/8x10 modified but really like my Schons and Jacobys. The only joint I won't use to make a cue is a standard 3/8x10.
Also the hardest hitting cue by far that I have is a bar cue that I made into a two piece cue just to try doing it. I just put a triangle tip on it, as that was what I was using to fix about ten or so of their other cues. The owner told me to keep a couple for my troubles and I kept one to try and make a two piece out of it. Really shoots good and makes me wonder what all this fuss is about layered tips when these triangles work so good.