In Asian culture, obedience, order, and hierarchy are the values that shape society. Western cultures value individualism, but in Asian cultures, you are part of a unit or group, be it family, department or otherwise. This unit has a clear head/leader (parents or boss) who makes decisions for the entire unit with everyone else expected to obediently follow, and this obedience and hierarchy that makes the unit successful is seen as the highest moral standard in Confucian philosophy. However, the head must also be responsible to the subordinates, sacrificing for the subordinates what the subordinates do for the head. If the head acts in this way, he is morally right and the subordinates' obedience is a reciprocation or agreement of a mutually moral relationship.
See http://hua.umf.maine.edu/Reading_Revolutions/Confucius.html for a quick summary.
If you're a poor Asian immigrant strategizing how to get your family ahead, you will think about it from the perspective of the family unit, ignoring the individual. The generalized strategy would be for the parents to sacrifice themselves to push the kids as much as possible. In Confucian philosophy, the head is 'moral' in beating the kids into studying because they fulfill their responsibility to the kids in providing opportunities for a better life, and the subordinates, (kids) to reciprocate morality, should obediently follow.
Unfortunately, the kids grow up westernized. Confucian philosophy works because the moral obedience and obligation to the unit gets so deeply ingrained, it defines your satisfaction and value system on a deeper, instinctual level. You can get pushed to do things you wouldn't want to do as an individual because you get value out of it elsewhere in a moral or social context. However, if there is no carrot because instead of Confucian values of the unit, western values of individualism is instilled, then there is a problem - from the kid's point of view, it's all suffering. Even worse, it's a direct affront to what society is teaching should be valued (independence and autonomy), and it creates deep feelings of your parents 'being wrong' in asian american kids, enough to be a widespread phenomenon.
2nd generation Asian American adults often feel slighted by their parents very deeply beyond rationalism, and it's a moral wrong, a slight to the fundamental rights of human beings - the right to be an individual. But the result is a successful upper-middle class lifestyle, jumping multiple generations of wealth accumulation in just one. This duality makes a lot of Asian American adults at odds with themselves and their culture.
A lot of 2nd gen try to push while respecting individual feelings, but there's too little fuel to go full tiger parent - you don't need to jump wealth gaps, you value individualism too much, and most importantly, you just don't want your kids to suffer as much as you did.
In this sense, the 2nd generation is similar to the 1st. The major motivation for Asian immigrants was to have a better life, and for their family to not suffer so much. Compared to starving, or being hunted down by communists, or living in old open air houses with no ac or sanitation, what's a bit of forced studying?
Contrary to the view of the article, I don't see modern Asian Americans as regressing. I think we have the background and tools to combine the best parts of both cultures - a little pushing to go beyond themselves, with the empowerment that comes from western individual thought - to create a very strong next generation in the future.