Like has been stated many times over, you can do what you wish with your own plants even if it's bro-science.
A well respected commercial grower has already commented here how they compared the results of both methods and found no noticeable difference through lab testing.
I will gladly take his information over the other bro science proponents who just say "Dude it's just more resinous!". They aren't even comparing clones but making the statement that it works.
Think about it with common sense. It take the plant months to flower and create resin, THC, terpenes, etc., but you think 2 days of darkness will create a significant difference? It's not even a logical thought process.