TSC might have duped me

[FattyChickens]

I bought a couple speckled sussexes and a couple black sex links. Well... the black sex links are showing some pink and comb growth at only 3-4 weeks old. Im a little paranoid that maybe they sold me black copper marans (they look very similar to black sexlinks in my experience). Do you know if black sex links are just fast growers?
The pink is hard to see in the photos

 

[nuthatched]

Too early to say yet .
Any hatchery can only offer 90% accuracy in sexing.