When did the balls show themselves?
I START looking for balls at around 12? days after flip. Most balls will have shown up by day 16. Do not wait till day 21 to pluck, because them balls could have already opened up, and dropped some pollen.
I keep a very watchful eye on any plant from seed, from any breeder. You just never know. And it's not worth having a room full of seeded bud, just because you were lazy, or because you have so much faith in a breeder.