Each of the people whose research the book used came up with their own interpretation of the data they collected. In each case, their conclusions are based upon what data they collected, and not what others collected.
An interesting comparison would be for those same people to review the SUM of the data Wade used (since they have access to it), and publish THEIR conclusions. Don't just say, "My research does not support that!", because you might not have been looking at N factors that other researchers looked at.