>>Only couple years ago, people would argue vehemently that dogs are not conscious.
This sentence makes it sound like you believe in 2022 everyone decided dogs are conscious in reaction to the latest shiny toy coming out of silicon valley.
You can find "people" who will argue anything, but I find it very hard to believe dog owners didn't tend to think their dogs were conscious a couple of years ago.
At any rate here's a quote from the Stanford encyclopedia of philosophy:
"In his seminal paper “What is it like to be a bat?” Thomas Nagel (1974) simply assumes that there is something that it is like to be a bat, and focuses his attention on what he argues is the scientifically intractable problem of knowing what it is like. Nagel’s confidence in the existence of conscious bat experiences would generally be held to be the commonsense view and, as the preceding section illustrates, a view that is increasingly taken for granted by many scientists too."
This would suggest sometime between when the encyclopedia article article was written (2016) and 1974 the ideas that animals like bats, cats and dogs are conscious became the majority view. It goes without saying but this has nothing to do with LLMs.
But even before then I find it hard to believe a generation who grew up watching Lassie (1954 to 1973) didn't believe dogs were conscious.
>There were long stretches of time when 'intelligence' was a benchmark for 'consciousness'.
I find that hard to believe? Really, the biological similarity of animals and humans would seem to be the obvious benchmark, not "intelligence" whatever that means.
The encyclopedia of philosophy again says
"Neurological similarities between humans and other animals have been taken to suggest commonality of conscious experience; all mammals share the same basic brain anatomy, and much is shared with vertebrates more generally. Even structurally different brains may be neurodynamically similar in ways that enable inferences about animal consciousness to be drawn (Seth et al. 2005)."
https://plato.stanford.edu/entries/consciousness-animal/