Not really. I don't see how seeing something different while crossing over disproves anything.
There was even this one incident I remember, one of the most well documented missionary events ever (since authorities became involved) with a huge documentary made on it and even a hollywood film later on, wherein a Native South American kills a missionary and sees his spirit "cross the river" or something like that in front of him.
It's sort of related to NDE's but I'll need to figure out the specifics so I can give you an accurate reporting of it if anyone cares to read it.
Right now I need to go over those cultural differences you guys brought up in that research.
I do have some limited net access again now through my current job.