The way hydrochris is doing it his blueberry seeds will be pretty equal cuz they are from a very stabilized plant that DJ short has worked with for a while. I also assume he's pollinating Blueberry with Blueberry and has no other males that can interfere.
In the world all blueberries are not created equal. Usually a dealer will name a blueberry tasting plant (that is not DJ short's blueberry) so that it will sell better.