This question drives me nuts!
First off no one can guarantee you take care of them with great attention to details.
Second if you have a goal that is quantity wouldn't one "reverse engineer" BEFORE starting to flower!
Third most breeders notes or descriptions lean towards bigger yields and short flower times than the plants will actually display.
I could go on and on.
Just take care of the plant and as long as there is good genetics involved it will take care of you.
This is classic putting the cart before the horse.