This is an awesome tutorial with photos! Thank you for digging up the old posts and bringing them forward. I think if we could quote this post every once in a while, it will really help people who are searching. I’m going to bookmark this page in my chicken genetics folder so I can always find it.Chicks develop at different rates. The male traits in an EE are usually obvious by 8 weeks. If a male trait shows up earlier (like Goldie's black breast) it just means that the other things, like his comb, are still developing.
For hatchery EEs, you can often sex by comb shape at an early age, but I use it more to confirm other traits I am seeing, like feather coloring. If the colors on the wings look splotchy or in patches, especially red patches, it's probably a male. Comb shape can confirm that.
I'm quoting some old posts below so you can see the difference between male and female combs. You can often tell a male comb before it begins to turn pink. I added explanations within the quotes. Click on the quotes to see.
Compare these to your chicks and you will probably be able to sex them yourself. I cannot see combs clearly enough in your pics to do it online.
Any doubts, wait a week and post again. I really hope you keep us updated. I want to see how they turn out.