My vote is for Roy's opinion.
Den. superbiens is a natural cross of Den. bigibbum (our State flower) and Den. undulatum locally known as Golden Orchid which can grow canes 6-8 feet in length.
Bud, I live in Australia, I have grown this plant, seen it in the wild, anything you care to name.
A label means nothing if it doesn't match the plant.
I dont know what to beleive ... but I will have to email the seller about this: because you may think as you want to think ... but I have to follow the tag for that is the only thing I will ever beleive in...unltil the seller emails me back.