Well, I can only take into account what the OP offers. The study in question was conducted at the New Orleans Baptist Theological Seminary where the students got surely familiar with it. But there is no mentioning in the OP whether other schools
http://www.univsource.com/theology.htm accepted the result of the study in preference of their own research and taught it to their own students so they could pass it on from the pulpits. Th.D.s are like Ph.D.s: they like to teach their own stuff -- you wouldn't hear much of the String Theory from the professor who heavily contributed to the development of the Standard Model.
The idea in the OP that
the majority of theology students were taught the subject but failed to pass it on due to their own decision lacks necessary support. Can you point me to it in case I missed it?