As a scientist, articles like this also annoy me. Because it, right off the bat, assumes that there are no degrees in consciousness. Just because we don't experience those degrees, and animals can't convey what they feel through language, we assume it is "emergent", or "suddenly there". I think we are too caught up in believing that consciousness must be something really special or some magic discontinuity of spacetime.
I don't believe it is. Somewhere inside our brain there is some perception of self related to the outside world. So we can project self into the future using information from the now and make better choices and survive better ("Information is that which allows you [who is in possession of that information] to make predictions with accuracy better than chance"- Chris Adami). Why do we need all these difficult words?
I bet animals also have some image of self inside there somewhere, and make decisions based on simulated scenarios. Perhaps to a lesser degree, perhaps because of a lack of language they experience it in a different way? Not being able to label any of the steps in the process... Who knows?
Perhaps when we get to simulate a whole brain we can get some idea. But then there is the ethics. We do attribute great value to organisms that have this image of self.