Not so sure about that. Some of the buds of old were definitely potent. I believe they were just undiluted. When I started smoking pretty much everything was imports. I imagine the same when Haze and Skunk were created…the plants used were not as cross bred so much as things are today.I think a lot of the weeds from way back in the day came across the borders with some other chemicals on them from harvest and perhaps opium or coca residue. Thats why a lot of old time smokers are chasing a high that doesnt exist in cannabis.
I would trade a lot of things for some of the bud I had in those days and I bet I would be very happy with the resulting effects.