Comment by tptacek

Yes, the constitution of the chicken's feed matters enough to change the color of the yolk, so much so that organic chicken farms introduce additives to feed specifically to color the yolks. And yolk color may indeed cause you to enjoy the egg differently! But there is apparently no discernible taste difference, once you control for egg age.

Multiple groups have done tests on this. Kenji did a somewhat informal test, where he dyed the eggs so you couldn't discern the farm egg. The Japanese have done expert panel chicken feed tests. It's interesting stuff!

I think people want this "farm egg" thing to be true more than it really is true. People got mad at me on Twitter when I griped about those Vital Farms eggs (don't buy those eggs! they cost more than 2x as much as commodity organic eggs!).