The article (click here to read it) points out that the egg industry uses misleading terms to obfuscate reality. According to Mother Earth News the egg industry can "label their eggs as “free-range” even if all they do is leave little doors open on their giant sheds, regardless of whether the birds ever learn to go outside, and regardless of whether there is good pasture or just bare dirt or concrete outside those doors!"
That's not what most consumers assume when they see "free-range" on the carton. To see the range of nutritional values from the 14 flocks, check out the table below. If you click on it, it should enlarge.