Also, if you want to argue with this neurologist and share your opinion as a biologist about what he claims, I'd suggest you take your argument to him. Or to any of the countless scientists who have been studying NDE's.
The only reason they are called "near-death" is because the patients were revived. Death, as a term, stands for a permanent state. So, "technically" it can't be "called" death. But until another word is invented I will use the term "dead." The only thing that changes about their "death" when they are revived is that it was clearly not "permanent."
Death, in the true sense, cannot be reversed. Clinical death, in which the heart stops and breathing ceases and the brain's functions begin to diminish from lack of oxygen, that can be cured, and the patient revived. If the brain has not died, then the person has not died; ergo, nobody has been revived from death, given nobody has ever been cured of brain death. I'm beginning to repeat myself... but it really is that simple. True death = brain death = nobody has ever been revived after brain death = nobody has ever been revived from death. The brain ceases function at the time of brain death (hence... brain death); yes, people have been revived from clinical death (the stopping of the heart and breathing) after 20-30 minutes, as you say (though that's stretching it a bit; after 13-14 minutes or so the odds of successful revival begin to decrease rapidly), but then, that doesn't count as technical, biological death.