I've not yet seen this article, but should soon.
In any event, there have been several of these type tests published the past few years.
In general, be careful interpretting these results. Rarely do magazines implement testing prototcols that are rigorous enough to account for variances in the wood and in assembly procedures. In reality, one would have to duplicate each joint many times to account for these variances.
This FWW article may have done a good job, but that is not the norm with this kind of article.
In the end, does it really matter? I've seen very, very few pieces of furniture with failed joints because they weren't strong enough. It seems traditional M&T, domino, and dowelmax -- if applied correctly -- all produce joints strong enough for all practical furniture making.