Yes, that's what the mystical traditions say. Is there a type-token confusion in it, though? Consciousness across all species and instances may be one type of "thing," but that doesn't mean there's only one extant instance of raw consciousness.
I can appreciate the difference between knowing something by understanding it as an intellectual matter, and experiencing the truth of it. But I'm not sure how much weight should be put on the identification with something like the form of consciousness, since we're pretty flexible in such identifications.
Driving a car becomes second-nature because when driving we slip out of our inner self, as it were, and extend our mind by identifying with the car-self hybrid. We identify ourselves also with all manner of political and religious organizations, and with our loved ones. Does the fact that we're so mentally flexible mean that all these things really are one?