Recap: (disclaimer) There is some paraphrasing done here so feel free to go back up and read entire context...mainly trying to show yeas and nays in one way or another so some additional validation/experience/thoughts given by responder may be omitted.
"I see no real benefit to doing this, just losing 5 days of growth."--natro.hydro
"i've heard of this, and done it, but not for 5 days" --Silky Shagsalot
"5 days is a bit extreme I feel, I did a 24 hour period of darkness and yes, it stretched a bit."--Silky Shagsalot
"It doesn't add up; ... In short, this is a solution in search of a problem." -- ttystikk
"Why are you wasting our fucking time?" --Ben Franklin
"maybe with a 100% sativa with a 16 week flower and a 3-4x stretch but i dont see it."--pinkjackyle
"your a fckwit simple"--weedenhanced
"Go fuck yourself, hard, you'll never grow anything that will amount to shit."--Ben Franklin
"I believe the darkness before flowering was originally created by the 24/0 guys because such little hormone was created during veg, and they realized that keeping them in the dark for 24-36hrs resulted in plants flowering quicker."--Squidbilly
"...but in my experience my plants flower pretty damn quickly no matter what I do, so no dark period for me." --Squidbilly
"I think 5 days is a little too long. Maybe 24 hrs of dark"--ayr0n
"stem cells will receive more flowering hormone if the flowering hormone is not destroyed by light. the longer the darkness, the higher the concentration of the hormone. 5 days no light means every stem cell capable of doing flowery shit will do the flowery shit."--ImGrowingWeed
"5 days of darkness not a good thing at all we have tryed this with no real good resaults at all bad streatch also a very high chance of hermi due to mass stress"--rob333
"i do 24-48 hours dark period on the flip.. there is a difference than just flipping over to 12/12 IMO...first 2 weeks into flower the ones with the dark period seems to develop faster"--6 Leaf General
"5 days seems excessive, but for monsters its reasonable."--ImGrowingWeed
"That would be my biggest concearn, that 5 days of dark would make them stretch wildly"--Squidbilly
" flowering "settled in" and finished more rapidly ... with 5 days of dark"--mentor