I confess to not having read all this article but it reeks of snake oil to me. For example, every square cornered cut made is a stress riser.
http://www.pavementinteractive.org/dowel-bar-retrofit-construction-practices/
I put this in a similar category to foam insulating the underside of a roof. It is a bandaid for a problem that should not be there in the first place and that is HVAC duct work in the attic. For less money and more effectiveness you can retrofit with a full-up zoned mini-split system and throw away all the stinking duct work.
Foaming the underside of decking not done right in most climate zones just creates new problems.
Interesting link, covers everything except why you’d bother to do this in the first place!