Interesting, I would not doubt the research. there are always different ways of doing things. One thing I noticed, Bills post mentions bass under 6 inches can be stocked alone but bass over 6 should be stocked with bluegill. Knowing Bill he would not have posted this unless he found that research.
using documented research to stock ponds is the smart play. I stock ponds based on the research that was conducted in southern ponds. I get great results with the ponds that I stock because I follow the guidelines to the letter.
It appears you have done your homework but you are not following that researched recomendation to the letter. (based on Bill's post)
you stocked bass larger than 6 inches. why did you not put in bluegill at the same time?