Orpingtons are a little slower to mature, I've noticed, so it's pretty early yet to know for sure. However, I must agree that's a lot of pink for so young a bird.
It's really helpful to have pics of both the comb AND the tail. A lot of breeds are hard to tell by just the comb (Buckeyes, for instance). But in combination with a more uneven, frizzly tail and more reddish comb/wattles, it's easier to tell.