What discussion you want to start with? Asia's the leading as of the moment but it might change sooner or later.
Sorry if I won't click your link.
There are many reasons for Asia too be leading now. More favorable mining environment (low cost energy), many developers in Russia and South Korea..
But as you said, it may change soon or later. I believe USA is still struggling with regulations, but as soon as this phase passes, it may become a good place for new cryptocurrency projects.