You're so right! I went back and forth on my EEs a couple years ago and finally gave up and just waited until the darn things practically started crowing, although by then it was really obvious by the magnificent feathering.You are right. Mine are older. Let me look @ pics of them at 10 weeks, then.
ETA: The only pics I have are recent, and you can't really see how red their combs are.
Pics of the feathers with something dark behind them will help. I hope it's a pullet. I find these hybrids so hard to sex