As usual the article is almost exclusively concerned with market capitalization as an indicator of economic success. Countries like Germany are dominated by small and middle-class, family owned business. 'Big corporate' is indeed more successful in the US or China but it's just one model to manage an economy and I don't think it's that great. One of the most important points is also buried at the end of the article >…
It's basically the only continent currently which have an acceptable price earning ratio.
Even if it's true that American whales had 10 years of exeptional growth, they are priced as if they will be able to have the same growth for the next 10 years.