All this drilling and tests may sound crazy, but I do think it teaches an important value that is missing in the west's education: discipline
My wife is a teacher. She taught kids in the US (California) and here in China. One difference is that in the US a huge amount of her preparation time is spent on making lessons interesting to students, otherwise they disconnect. In China she is more focused on the lesson's subject matter, rather than tweaking the lesson for entertainment / attention value.
True, Chinese education does not value creativity or self-expression like in the west (and Chinese students are aware of that). But the lack of discipline is not the way to go IMO.
Jean Hsu's post is wonderful, by the way.