[gdani]

It is getting better though because of the large scale breeding in Holland and California creating new strains.

...which has been going on for decades.

[Sir Gawain]

I think we're splitting hairs. I agree that there is a potency ceiling that has probably been reached from some wild plant growing in Thailand for thousands of years, but massive cross breeding has brought the average potency level up during the last 50 or so.