You'll know for sure in a few weeks, but I think your breeder is wrong. I had OE boys also and they were all the same color as the ladies (until they started getting saddle feathers at 12-13 weeks) but had big red three row combs. Let us know how it goes!Ha ha, I guess time will tell. The breeder did say to wait a bit longer, but looked very puzzled when I brought the bird back. He was pretty certain it was a girl. I assumed a boy because of it's behavior with the other birds as well as the crowing. He told me that he could tell by the coloring that it was a girl.
I'm new to chickens and find all this very baffling.