You make good points.
However, using pure Ameraucana stock that came from blue eggs (like my Blue Wheatens) will greatly increase your odds of green layers. No it will not
guarantee this outcome but you've got a better chance at having green layers that were bred by a breeder who chose the pairings carefully than those supplied by a hatchery. Mostly because you have no idea what is in the hatcheries breeding pens. We all know hatcheries are only out to mass produce and sell, sell, sell so they throw whatever they can into a pen to make EEs as quickly as possible, thus the reason you get a lot of brown or "pink" egg layers from some hatcheries.
Yes Ameraucanas are a relatively new breed that came from a mixed background but I've been highly selective in who I sourced my breeder birds from, only to then cull seriously for the birds that I would begin my breeding with. I feel my stock from Jean Ribbeck is a very good quality. Jean has progressed leaps and bounds over the past couple years with her birds and I feel she's truly a breeder to respect and look to for advice as she produces some very nice birds. That said, I do have a hen that lays a slightly aqua/teal egg which indicates that there is a brown egg gene somewhere in her ancestry but her type and plumage color and overall confirmation to the Ameraucana SOP overrode the fact that her egg color isn't the "pale blue" that Ameraucanas should lay. I personally prefer the teal colored eggs to their paler counterparts because they seem so much more vibrant in color.
Does this bird have a greater potential to throw brown egg laying chicks because of this fact? Yes.
But, could she still produce green egg layers too? You bet.
I guess when I said "You would get some lovely, highly productive green egg layers out of the hatch..." I should have said "You should"...
