Yep, my Buff colored Gold Comet did prove to be a roo...an undetermined predator got him midday through the fence though, so I didn't get to see him grow up.
I would have to agree, you have yourself a cockerel there. I too bought, 9 golden comet pullets, and one that I have named, Creamcycle, is now leading the rest to food, making the tuke tuke sound when he finds something..not a hen in my book, must be a second generation Golden/Sexlink. Here is a picture of him.
All Roo if you ask me! his other side, is mostly copper/orange in color. So you tell me, what do you all think?