It depends, i suppose on the season. The missing monsoon went east to Queensland and we had abnormal rainfall in eastern NSW as well.
One is opening today and others have advanced spikes, my guess is the plants are several weeks ahead of their normal schedule.
My blast experience is when they bloom later and it is starting to get a bit too cool for their liking and yes, they will bloom off tiny plants.

Thanks Arthur. Our local Dendrobiums (affine & canaliculatum) flower in the dry season so thought this one might as well. Although, it could be forgiven for thinking it was still the dry season, LOL. "Missing monsoons" seems to have been a continuing story throughout this wet season for us. I've put it out in brighter light now, the shade house has a big Poinciana growing over it. Once it leafs up the shade house really becomes a shade house.

I was in Cooktown last September and they were selling these bigibbums at the botanic gardens/museum. Seemed an appropriate place to get one. They were quite small so easier to travel with.'

The spike has withered so must have been too young yet. But it shows that it's keen to go so hopefully when it tries again it'll put on a good show.