I don't think that is 100% true. My friend gave me some weed tonight for free in the form of a joint, and a sack about 2 bowls worth (FOR FREE, because I hadn't smoked in forever). Well, it was brown, and I smelled it and it smelled good.

I smoked the joint, and I was soooo fucked. Look for some posts on this board in the last couple hours, since about 9, that are from me.
And, about 3 hours ago I smoked a bowl of it, and have one bowl left to smoke. I'm starting to come down in terms of body effect, but my mind is still so screwed up. My body buzz is actually OKAY.

I have this bowl to smoke, before I go to bed, and then I had to throw away the homemade pipe. Or stash it somewhere.