I think that quite often it's a matter of paying for consistency. BKPs are hand made, and so will be subject to QC all along the process - this isn't necessarily true for bigger producers. Fender and Gibson are classic examples - large name brands, producing some fantastically inconsistent guitars, some fabulous, some tragic.
I don't think it's necessarily true that you get what you pay for. Sourcing products that are properly controlled, that's the secret.
Mark.