Look at the dog in front of you.
Work with the dog in front of you.
If the brother was a superstar -- per them, the genes are there.
I would not necessarily believe them. Do not allow what they said to affect how you view your puppy. It is possible that they have personal or professional issues with the current owner of the dog, and are getting back at them in a mean way.
Yes, dog people can be as crazy as, or crazier than the rest of humanity.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC