Well, that is a good question. I think the distinction made in the article about hiring for 'looks' rather than 'qualifications' is a valid point. The other day I was invited to speak at a conference in Turkey. I had to pass, as I had other obligations, but I suggested that one of my 'non-native' colleagues go in my place. However, the reply was that they were looking for 'natives' as they had enough locals already. So, the perception of 'native' versus 'non-native' is something that runs deep within the EFL culture. Interestingly enough, as the 'non-natives' now far outnumber the 'natives', it is perhaps worth considering that the balance is shifting. See http://globish.com/ for an example of how doing business in English can be reduced to a minimum requirement for vocabulary and grammar. A powerful argument.