Lol, that’s actually what I’ve read. In cases was someone was enough an “old timer” it’s likley they’d been to the site before, or had worked enough or had enough intuition. In those cases the chi squared was decent with the rods compared without.

… In a new site built specifically for testing, not so much.

So that’s interesting from a psychology perspective, something giving someone “permission” to focus, but water divining it was not.