Even most of the shitty mexican schwag has good genetics, but it was pollinated for one thing and went through a hell of a trip and probably a year before it got further north and was smoked by people like us. You get high of schwag even if it's not so awesome. Grow the seeds, you could be pleasantly surprised.

I think a lot of that applies to the 60-70s as well. Maybe it wasn't always sensi or it'd been used to make hash before it went out, things like that. There was probably a lot of shitty weed like someone mentioned, which is why you may hear people who were around back then say that the weed is better now. It's also all about who you know. You can get shitty weed and good weed nearly anywhere in the world today.