This post by The Last Psychiatrist is an excellent breakdown of the article (and WHY it was in the WSJ in the first place).
http://thelastpsychiatrist.com/2011/01/why_chinese_mothers_a...
In this case, I think the simplest reasoning, and one Chua herself hit on, is correct: They strung together the most controversial parts and got bundles of page hits.
I think only the very last paragraph analyzing the WSJ's motivations overreached a bit, making them a bit too complex.
The WSJ's wants to sell papers and add space in those papers. That story just makes for great bait for readers, I mean look at us we're all discussing it.
But the analysis of the mother is just brilliant.