No one means for Easter Eggers to come off as second class birds, but they are too often confused with the pure Araucana and Ameraucana breeds. They are not the same things. Easter Eggers have had a lot of things bred into them to boost their production levels, making them a great choice for a...
If they are used to being handled, I doubt they are stressed. It might be that their nutritional needs are out of balance from an over-indulgent owner feeding too many goodies to his babies, though.
For pullets that mature in the fall/winter, 6 to 9 months old is perfectly normal. The shorter days does seem to slow their development a bit. The days are getting longer now, so they should be starting soon.