The most interesting part is the deviation of spoken Arabic (which as mentioned in the article, varies by region, e.g. Saudis speak different Arabic from Jordanians, or the Lebanese) from written Arabic. I'm a native Arabic speaker but most of my education and upbringing were in English, so I tend to use the "higher form" i.e. written Arabic, when communicating with fellow speakers. And yes, it is terrific indeed.