I feel like the author wrote this article with a bias that Western websites are better and more aesthetically pleasing because it's simpler. But those are all subjective matters and Asian users probably prefer what they have. I come from a Korean background and I visit many different Korean and American websites daily, including the ones mentioned in the article. While some of the reasons given may seem plausible, no…
Since Japanese sites apparently look like they have not evolved since they were last like English sites around 1998, the better question might have been what factors have been driving evolution of English sites which did not affect Japanese? You may add other languages, but I'll just stick with Japanese since it is referenced by the OP.