I've talked to stern quite a few times over the years too. I've also read the articles years ago. However, I've searched and there is only one paper I can find with scientific data to back it up. In the end it says Yellow could possibly help but nothing radically better.
http://www.danielsternlighting.com/t...fog_lamps.html
Quote:
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Good (and legal) fog lamps may produce white or Selective Yellow light—it is the beam pattern, not the light colour, that defines a fog lamp—
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