Oh, Yea. I agree if "she"' is behind her siblings. Not good for your project! (Unless they are ALL males. Would that make a difference? Or not due to the difference in hens they are out of? (Shouldn't a female from a CornishX still gain faster than a male from a smaller hen. Kind of seems...
Any updates on gender? I'm wondering if T-3 is male and S White is female. Which would {at least partially} account for S White not being as good of a "gainer" as T-3. (Wouldn't it? LOL)