There were two points in the text at the link:
"For Delphi to work, it is critical that the targeted group be kept away from knowledgeable people who could lead them away from the Delphier's pre-determined outcome."
And,
"It requires well-trained professionals, known as "facilitators" or "change agents," who deliberately escalate tension among group members, pitting one faction against another to make a preordained viewpoint appear "sensible," while making opposing views appear ridiculous."
It sounds to me like US journalism schools have been educating our journalists on how to be good practictioners of The Delphi Technique.
Liberal Democrats have been using this technique for years.