Isn't it true that at this point, most "Durban Poison" is just various combinations of the different strains that float around the area of Durban? By that I mean, it is now nearly impossible to get what was originally bred by that name, pure and stable?
I think the problem is more genetic pollution from hybrid strains from Amsterdam that were introduced to the area over the last 15 years. You can't stop rogue pollen!