[macgarnicle]

Having done this mod (2014 LED fogs onto a 2011) I can say that it does work and is a very easy swap - plug and play. One thing I did notice is that the lens on the new fogs doesn't protrude out as much and so there's a slight gap between the lens and the bumper. New fogs are much brighter and do a better job of illuminating the side of the road - look great too! Would suggest you check to make sure they are aimed properly after install.

 

[macgarnicle]

Isn't the point of "fog lights" to be a narrow pencil thin beam that will penetrate the "fog" and not spread around to be reflected by it?

I'd say that is inaccurate. Fog lights are positioned lower to try and illuminate the road from as low as possible and minimize the glare off the fog. In that regard, as wide a beam as possible (albeit with a proper height cut off) is more advantageous as it illuminates more of the road.