Ed Sanow and Evan Marshall's "study" on the effects of stopping power has been suspect, if not outright dismissed, almost since the time it was released back in the early 90s. Many in the gun press have criticized, correctly, in my opinion, that their findings left out much data that was essential in their recommendations as to proper bullet weight, caliber, etc.
As many here will attest, there is seldom that two experts will agree. I go to court and testify one way and then the other side brings in their expert to testify another. If the expert cannot disagree with what has been said, then the attacks begin aginst the initial expert.
Often times I will use scientific works of others and the opposing counsel will then attack those works.
There will always be a difference of opinions,no matter what the subject or who the experts are. S&M research papers have been accepted in court trials for many years.