Who Speaks English Today?

This was a very informative article. I always knew that there were so many different dialects of English, but I had no idea how many! And as far as labeling English-speakers, I kind of always just put them into "native speakers" and non-native speakers."  This article really opened up my eyes to just how particular labeling speakers can be.  In the first paragraph, it is stated that :it is difficult to classify speakers of English..." (15).  I agree with this because there is no one that can fit into a perfect cookie-cutter description because everyone is unique in their language learning abilities.  There are some native speakers that know less English than someone who is learning, and vice versa. And then there is the issue of people that learn two languages at once, or they are fluent in both.  There are just too many different combinations and circumstances.  So the fact that people are trying  to fit every English speaker into 3 different categories is baffling and confusing.  Also, who is to decide if someone if someone is more proficient than someone else? 
In conclusion, I understand why it is important to categorize learners, but if this is to be done, then there needs to be a wide range of categories and more specific descriptions of each category.