When we refer to the market on the actual continent we refer to it as Africa (or the african market), so in a way it's implicit that we're talking about countries in the north.
[1] Please don't argue with this. This is common usage in modern day English, even if you might not like it. You know it, I know it, we all know it. Also note that the Estados Unidos Mexicanos (United Mexican States) are commonly referred to as just Mexico, so why should there be a problem with calling the "United States of America" just "America" for short?
Also, you seriously don't expect Americans to know that Africa is made up of many countries, nor understand the difference between Morocco and Kongo (for instance)? As a non-American, that's rather shocking.
[0] http://www.columbiamissourian.com/stories/2008/10/20/debunki...
Unfortunately (or fortunately, rather) while the geographical terminology is correct, I'm not sure the technical terminology is. The Ars article (and the blog it was largely copied from) says there is "little to no capacity for cloud computing" (outside South Africa) which is not the same as "no supercomputers."
I wouldn't expect an American to know this.
You can't be serious.