Seen it done. It is real for some and not for others. Some kids will facilitate with some and not others. You have to know these types of kids to understand how that could be but I have been there when non-verbal kids gave over information that we checked up on. I have also seen those same kids refuse to respond to others.
I strongly believe that anything that holds access to that much true information (in regard to Torah and emes) has to be surrounded in controversy or other opportunities for disbelief. That’s how we continue to have bechira.