I believe you that it works, I'm questioning the explanation. Without knowing what causes the bitter taste it's not science, it's stoner lore. It's interesting and important, but as I stated just keeping the plant slightly stressed in some way will induce improved flowering.
One more thing to recommend your stem color technique: if excess nutrients do indeed cause poor taste, it's important to limit them from the start, because many are mobile like nitrogen, and are simply being moved to the buds in the same amount they would have been in the first place.
One more thing to recommend your stem color technique: if excess nutrients do indeed cause poor taste, it's important to limit them from the start, because many are mobile like nitrogen, and are simply being moved to the buds in the same amount they would have been in the first place.