Yes, that is a Cornish Roaster...one more week until processing. She got picked on a bit by the other chickens so she has a few bare patches on her sides. Our other roaster broke it's leg at about 4 weeks of age so we had to put it down and put the second one in with the other chicks. I feel sorry for her, but I have nowhere else to keep her separate until processing and I think she would get lonely. At least she isn't bleeding or anything...just a few missing feathers so far. I have been keeping a close eye on her though.Its a pullet, the rooster would have different coloration.
That looks like a broiler in your 5th pic, looks about ready to eat.