What Cass said... absolutely on in my opinion.
I can't give any scientific yay or neigh on this subject but I can offer you my take and why.
I actually did die... when I was six. I remember it quite well. As in I remember dying much like I remember eating mulberry's out of my grandmother's tree. I had been sick for weeks and the old 'come to the house' doctor of my grandmother's was treating me at home. Time is kind of weird when you are a child, but I remember him and I remember my siblings sitting with me a lot. I was told later that old doc was giving me intravenous fluid's because my fever was very high and wouldn't come down and I was dehydrated. The problem with that was my kidneys had failed and he wasn't helping. In those days it was not unusual to have a 'come to the house' doctor I guess, and his assurance to my grandmother that I would be fine kept her from hospitalizing me. I don't remember the details of all that... but I remember very clearly my grandfather bursting into the room and grabbing me up in his arm's. That kind of woke me out of 'dream land' I guess. The next thing I remember he was handing me to a doctor of some kind and that doctor yelling at nurse's and stuff and throwing me down on a cold table and most of all I remember him removing my shirt and I was very upset by that. Everything that came after I witnessed from above it all. I guess I was 'clinically dead' when my grand-dad got me to Children's Hospital and they revived me with much work. I remained in ICU for 3 months and in the Children's Ward for another 3. I remember hating it.
So, when we talk here of this research stemming from near death experience's ... who knows. I just wanted to go home. I didn't think much about what happened on the other side.. There have been experience's throughout my life time that made me wonder if dying had to do with anything. But, I never dwelt more than a moment or two on the thing.
However, through experience in later life, I have to say that from what I understand... Cass's quotes are right on... And my understanding came from allowing communication with 'other' randomly just because it was here and from The Guardian who came to read me up one side and down the other for allowing that to happen and making him come all this way to tell me what I already new. Believe what I say or not. It happened. And, I got a Angelic 2x4 upside the head for allowing it. I could go into a long conversation here on the details, but for your benefit I won't. suffice it to say that what Cass said about instantaneous communication is correct as far as I know because it is Vibrational. It goes like this
Spirit Voice = Vibration
Ethereal Voice = Symbol
Physical Voice = Word.
So the real problem with communication is that we have no understanding at all of what the Vibration is actually saying unless the Vibration chooses to be truthful. And even then you have that pesky matter of interpreting Vibration into Word CORRECTLY. I mean face it. We tell someone we broke a toe and a week later someone heard you broke your leg and a week later someone else heard you were dead.
I don't see how these experiments are any different then messing with a Ouija Board... and most of us know how that works out. But this is just my opinion. And... FYI.. Angel's aren't always all sweetness and Light you know. They tend to have a temper sometimes, when we are being stupid.