This sounds like fluff to me. BP's are hybrids... meaning they have no real origin... Unless you are referring to the fish that are bred to create BP's... but then of course you would have to claim you know what fish are used to create them, and really, no one knows...
Anyway, I too have a few bp, and one is very aggressive. It's going to be a 50/50 chance as to wether or not your bp will be too much for your fronts.