Since you're getting few responses, and little concrete help, maybe you should do a brief study or survey on the topic. Seriously, some literature review and an objective survey of some kind might be a nice contribution to the professional literature. I could see a couple of possible topics: (1) How do the people who do it (or say they do it) define it (there may be several answers), and/or (2) what is the perception from outside the Christian (or other-religion-based) field (either other professionals or laypersons).

Maybe you could even find a grad student who needs a research project to do some of the leg work.