Some say this, some say that. Just because someone says something that is then repeated on the internet does not make it true.
Lab studies done by the U. of Miss. published by Mel Frank shows that THC levels are increased by lower RH and temps during flowering, and harvesting during a plant's night cycle. Can you tell any difference by smoking, I doubt it. Only a lab test with a control group will verify this. Anything other than a lab test is merely conjecture, speculation.
Since its photosynthesis that produces a plant's flowers, with all the materials that go along with that plant part, why would you want to do exactly the opposite of what's natural regarding a 0/24?
Treat the plant like normal maintaining healthy leaves until the end for the best results. I doubt if giving a plant oddball dark periods will do anything other than please the grower who wants to believe in them. It's phytochrome levels and photosynthesis that drives flowering, and once you hit the magical 12/12, it's a done deal.
UB