You are right... hens can be so different due to their environment (as well as personality or breed).
My first flock in 2010 I got 3 pullets hand-raised by homeschoolers (2 Black Sex-Links, 1 RIR) and 4 Golden Comets (sex-links) from a farmer. The difference in those groups was nite and day - but they all warmed up to me and had to live together. One from each group lived until 10 years (stopped laying around year 6).
My first flock in 2010 I got 3 pullets hand-raised by homeschoolers (2 Black Sex-Links, 1 RIR) and 4 Golden Comets (sex-links) from a farmer. The difference in those groups was nite and day - but they all warmed up to me and had to live together. One from each group lived until 10 years (stopped laying around year 6).

