Do read my comments in the original question where I explain that there is very likely a difference between a brain which is dying, or almost dying, and one which is not. One might expect the experiences of the former to be somewhat unique, no?
Regardless of what a patient's religion is, if they're in the news we read then they're in a country where if the Christian concept of the afterlife, if not widely believed, is at least widely known. The reason why even non-Christians' experiences may feature Heaven and Hell (that's where you're going with this, right?) is most likely a simple unconscious association of these ideas with death. It doesn't denote belief, and it certainly doesn't speak to reality more than any dream does.
As for factual observations of things not visible or audible to the patient (which is getting into the more general field of out-of-body experiences), those are exactly the events which have not been verified. There are stories of course, but nothing that it's actually possible to pin down and say, "This happened."
Disagree with me? Then don't just wave your hand at the world and say the evidence is out there. That shows us nothing. Go find some concrete examples and link to them in a comment (use HTML links please, as in a href), so that we can do our own research and come to our own conclusions. Make an effort.
That's not just to Iens, it's to everybody. Show us what you've got.
The thing to remember is that someone having a near death experience is, obviously, near death. The brain is in a panicked state. It hallucinates, or dreams, of happy or fantastical things to get away from reality and pain. Since the person knows on some level that death is nearby, thoughts are likely to turn to the afterlife and whatever concepts of it the person has been exposed to. Of course Heaven and Hell are going to figure heavily in these hallucinations. Contrary to what you suggest, I think people simply have Heaven and Hell in mind when they have their NDEs.