Actually IE has huge leads in South Korea and China, who are among the top internet users. The Microsoft blog post linked above has the root cause here: StatCounter has outsized representation for India and Turkey, both which see heavy Chrome use, and doesn't adjust its overall numbers to account for this (a fact which they are open about, but it diminishes the relevance of their overall number).
And what is going in in Australia?
In Europe, Chrome has a small lead. In Asia, a medium lead. In South America, a large lead. In Africa, both are dwarfed by Firefox.
One possible unfounded speculation would be that it is connected to the age of the widespread adoption of the Internet. In North America, most users have likely been on the net for a long time and therefore use older, more established technology. In India, Internet access is likely a new thing to many people (and businesses), and they are therefore less "invested" in older programs.