Ok, I grew up in a mid sized IL town, nestled among corn and soybean fields, and we had some local stuff available to us, but this was during a time when things like TV dinners were the rage, and well, we just got our food at the grocery store. Where I grew up all the eggs were white. I didn't know brown eggs existed until I got to the East for college, and out here white eggs are rare.
At first I wouldn't eat the brown eggs, even though they were just the same. I now associate more local/natural with them since mine lay brown (and blue). I should get some white egg layers someday.
Point is its very easy to be disconnected from food production and most people are. Thankfully the convergence of concerns about food safety, environmental impact of food production, treatment of animals, and even the economy is leading to a lot of interest in different food production methods.