No, there are far more threads than that.
Here is a short list of thread where people asked about dendrobium, questioned if it is stronger than DMAA, if it will get banned due to it's perceived potency and asked which other products which contain it etc etc.
A lot of people suspected dendrobium was the cause of strong stimulant effects so other companies tried to capitalise on it by adding it to their product.
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You can find similar threads on Anabolic Minds and other forums.