i've never heard this? what's the idea? harvesting earlier for a more energizing high?
you got some fun reading to do
harvesting when the trichs are milky, the stage after clear, and 8 weeks or so for most strains will give you a more energetic high. This is when the thc is highest. The longer the plant flowers the more thc "degrades" to cbn and gives a "couch lock" and less psychoactive high. For sleep and stuff. For indicas you want to harvest early as if you wait to long you will get weed that will just put you to sleep. For sativas you want ot wait longer. That is the general rule. Their are all kinds of preferences. The best thing to do is to buy a jewlers loop on eBay for 10 bucks and look at the colors.
Read the trichome report sticky in one of the forums. I think it is general marijuana growing or indoor growing. "Amber alert" it is called. Lol.