100% bunk.
Of course there are people who have found water. That's exactly what you'd expect by blind chance. And if you're one of those people, or if you know one of those people, you can't be blamed for thinking there's something to it. But every time it's actually tested, it turns out to be no more successful than just rolling the dice.
Yeah I agree. No science behind it, it seems. I don't believe in anything you can't prove with science regardless of who saw or heard something so I'll agree and call it bunk.