Here's the skeptical POV.
From the page FMZ references as the source of the 80% figure:
After asking 27 NDEers if they wear a watch, about 80% said no. Most say they do not wear watches because they mysteriusly stop working. Some say their watches work fine when they don't wear them. I originally read about this phenomenon in a Melvin Morse, M.D. book ("Transformed by the Light" page 142). I originally thought he had to be crazy when he wrote "One-fourth of a study population that mysteriously stops watches is astonishing, especially compared to the other groups we studied." When I read that, I stopped reading his book. I thought he was being absurd if not lying. Up to that point, I had enjoyed his book. But now I'm a convert. If you know of any NDEers, just ask them two non-leading questions: 1) Do you wear a watch? 2) Why not? The vast majority of NDEers are not aware of this phenomenon and they don't connect their watch problem with their NDE.
Morse says 4% of normal adults and 2% of out-of-body experiencers claim they make watches stop. (emphasis mine)
Ignoring the fact this is is not a scientifically valid study, and is just anecdotal evidence, which as we all know is 'no evidence at all' (as the saying goes)... ignoring that:
What the above quoted text says is:
80% of NDEers do not wear a watch
not
80% of NDEers cannot wear a watch because they stop working
What does it actually say about the number of NDEers who cannot wear a watch because they stop working?
Most say they do not wear watches because they mysteriusly [sic] stop working (emphasis mine)
It is not stated what figure most accounts for out of the 80%.
It is 'interesting' that the author is able to calculate the 80% figure, but unable to put a percentage on the real figure of interest: those who don't wear a watch because it mysteriously stops working.
The second piece of 'evidence' goes against NDEers. According to the statement about the Morse survey, 4% of adults and 2% of NDEers claim they make watches stop. So having a near-death experience makes you less likely to stop a watch, according to these figures. Given the potential for people to be credulous, I'm surprised the figures are this low.
Without further clarification of how these surveys/studies were conducted, and the exact figures involved, we are left with only the fluff of anecdotal evidence, from which you can draw exactly zero conclusions.