I have an Australorp pullet the same age, her comb and wattles are much smaller and certainly not as red. I'll have to vote yours are roos.
I think my Australorp "girls" may be "boys"....??? - Page 2
I am thinking you are all right, but we are going to wait it out and hope that they remain the sweet little (well not little, ha!) things that they are right now! They haven't even tried to crow yet, so maybe it will all turn out fine! If not, I do have a place where they can go live that will treat them as good as I do and I know they will have happy lives!!