"Billions of digitized thoughts are transferred between humans every hour of every day, more than the neural messages within any of our individual brains." - this one is quite interesting as a kind of objective measurment (density of information exchange?). According to that conceptual framework in which "consciousness is simply a process of information exchange" (I took it from Culadasa's "The Mind Illuminated", but it's probably much wider) one could thnk in terms of "phase", which level of consciousness dominates.