I believe yours are all girls. However, we had a nice little pullet that "suddenly" developed into a fellow! Nice one too! The Orpingtons tend to mature a bit slower at times.
Here is what won Best and Reserve Breed at Crossroads Joint Natioanl, October 2011.
Reserve Breed, rooster
Best of Breed, Hen
Here is what won Best and Reserve Breed at Crossroads Joint Natioanl, October 2011.

Reserve Breed, rooster

Best of Breed, Hen