Not necessarily were all the facilitators the same person, but it seems likely that they all went to the same seminary.
This whole topic reminds me of the “near death experience” hype that was big in the 80’s. The frum velt picked up on it a little later (10+ years), as well. Both concepts make for great fiction writing. Whether there is any non-fiction to be written is doubtful, and certainly it is hard to believe it about every Tom, Dick, and Harry who is interviewed for a book. Gary Larson gave the best explanation for the NDE phenomenon.
Kind of makes you wonder if all the facilitated conversations with gorillas were staged too. Just kidding, we know those are real. But I never knew of a gorilla who predicted moshiach.