I don’t think any of this is true. The real reason Asians have done so well is two fold. Firstly they assimilate. After a child is born in the US they have no accent. They think and talk American. In China they call these people ABCs (American Born Chinese). They look the same but real Chinese know they are very different. And they have little clinging traits. They are as likely to live in a white neighborhood as a mixed race or Asian neighborhood. Additionally, the Asians that come here are not the average Asians, they are coming here for college. They are the cream of the cream. So of course they do well. The average Asian came here a 150 years ago to work on the railroad. And they still lived in ghettos in the wast coast cities.
African Americans came to American largely on slave ships. Not only were they not creme. They were often the bottom of society. And they grouped. They still cling to ghettos of almost all blacks. Many could live anywhere but choose to be near other blacks. Also, they speak ghetto even if they can speak perfect American English. So, while individually they can escape the ghetto, many are not really trying. They just want to be the richest person in the ghetto.
their redeeming characteristics is that they work hard, long hrs, live in large groups..grandparents,mom,dad, several kids and perhaps an uncle or two, and they try to buy some business where the whole family works, but they still live together...
AND, they feel strong obligations to help other family members....they will send big chunks of money back to their parents or to a niece or nephew that is in college....
my Vietnamese friend says that it is EXPECTED that they do so...
“The average Asian came here a 150 years ago to work on the railroad. And they still lived in ghettos in the wast coast cities.”
In Hawaii they came to work in the sugar cane fields,they were not educated,now they virtually run the place.
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Your thesis has holes in it. Some remnants may have teeth. But not all.
My wife is Chinese-American. She and her five siblings spoke only Chinese until they entered public school as 5-year-olds. They still speak Chinese as well as perfect English. So no, after Asian children are born in the USA, they don't necessarily speak English with no accent right away. Many enter public school in confusion until they pick up English by association with others. And a lot of Asians didn't come here just to work the railroads. A lot were sailors or workers who came to work farms or do other work. Some of that had to do with racist policies in play. When there were restrictions or outright bans on one race, say Chinese, then employers brought in Japanese. Then Filipinos and so on. Not all were in ghettos, as many were farm workers. A big example are the Japanese, who converted unusable land into rich farmland in California's central valley, only to have it taken away when they were sent to concentration camps.
As for African-Americans, they had it the worst. Many want out of the ghetto, but peer pressure is strong. I have well-to-do black friends who lament that their grown kids want to hang out with ghetto kids and they mimic ghetto talk. That's a tragedy.