I am updating this post because I know many other members are trying to sex their easter eggers this time of year.
All four of my easter eggers (pictured in original post) were indeed pullets. Their eggs are beautiful, they started laying at 19 to 22 weeks. They each lay 5 to 6 eggs per week. Two lay very blue eggs, one lays a bluish green, and the other lays green. All were purchased at tractor supply from the pullet bin and were from Ideal Poultry. Out of 11 assorted breeds purchased as pullets, all were pullets.
Uh Oh. Sweet Caroline might be a cockrell! I've recently noticed that his/her comb seems to be getting another row. Otherwise I haven't noticed any rooster behavior or traits.