How so? Durban Poison is just the name that was given to a hybrid made from a Durban sativa and an indica. Sensi just calls theirs Durban.
What do you have other than what you read on that website to backup your "Trash" claim?
Have you grown Sensi Durban? Or did you just get this warning based off of what you read on that website you linked to? If you haven't grown it then you really can't warn people based on something you heard. That's just third party information and how rumors get started.
And as far as mass produced seeds. The same thing is going on in the US. Mass production of seeds. I can guarantee that a lot of the stuff people are paying top dollar for from some of the US outfits are the same seeds being sold under different names. And as far as Spain goes there are some excellent outfits operating over there. ACE and Cannabiogen come to mind. The breeders from these outfits were probably breeding cannabis before you were even born.
And there is no way that you can know what's in the genetics from breeders outside of Spain. They can say anything they want. That's why I don't put any faith in articles promoting one company over another as they are typically biased and have some kind of reason to promote one company over another. More often than not the reason is financial.
I've grown Sensi Durban and it was not trash. That's first hand information. In fact I've used it in a hybrid cross I made using the Durban and ACE PCK. Sensi Durban was definitely top shelf product. But as always the end result is going to depend on the grower. One growers trash can be anothers fire.
Here's a Sensi Durban I grew and pollinated with ACE PCK pollen
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Here's an F3 of that cross.
There is nothing wrong with Sensi Durban. It's not trash. You really shouldn't just repeat things you read online without having anything other than the webpage to prove your claims. I don't care if it is a 15 year old article from cannabis culture magazine. The exception would be scholarly articles based on science and peer reviewed with links to sources and corroborating information.
It seems to be popular these days to bash all the European breeders that have been around for decades while praising some stoner in the US that chucked some pollen, made some Cherry Grape Space Monkey Kush, put up a website, and is now selling seeds for $20 a pop.