Yeah, I've heard that the longer you wait, and the more you let the trichomes develop the more of a "body high" (couch lock). Or maybe its the other way around. It has to do with the shape of the trich; there is the shaft, and then the top part that looks like the mushroom cap. The top part is what gets you really high, not sure if its cbd's or cbn's, but it can at least point you in the right direction for research.
I saw a post from someone on here a while ago talking about how growers should gauge which high they like more, head or body, and use that to determine when to harvest. It was based off of the whole "structure of the trichome" thing I was talking about.
I can't wait to start getting some harvests and playing around with that, lol. Dammit I wish I could get my ballast today.