i read about 10 pages and no one made the abscisic acid link in that span, if it didn't happen in the pages I skipped over consider this it. Abscisic acid application has been positively linked with THC% increases at harvest. Stress regimens (piercing, pinching, water stress both overwatering--"flushing" and under watering, decreasing light periods, pruning, light spectrum changes, UV(c/b) dosage increases, and so on and so forth use your imagination) are going to increase abscisic acid release by the plant, theoretically increasing potential THC% etc. So what really matters is when you do this, to what extent you stress the plant, and what genetic stress response the cultivar you are working with will manifest. Also, the end effect of the product has a lot more to do with curing method, as some of the really valuable terpenoids are lost with improper cures. So in defense of unlucky, this should work.
Happy to discuss with anyone genuinely curious about the studies I've poured over, I may come back and edit this post with links if enough people ask respectfully. Troll away, I will ignore the BS posts gladly, no offense intended I was a teen once too just got no time for it now.
Peace,
MPP
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Edit/link addition at unlucky's request:
http://www.springerlink.com/content/e88723w866761743/
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edit/p.s.
May I recommend sterile method since you are performing an invasive procedure? Surely you thought of it but even a flame or wipe between piercings on the same plant because of microbes sitting on the plant exterior