I think the individualist streak in American culture is better shown by people being unwilling to seek help from friends/family. I might call an unwillingness to help others (assuming one can afford to do so) selfishness -- not individualism. But what I have seen in American is, as you said, individualism: People are prideful and want to create wealth without help.
An interesting clarification: People will more readily accept help from strangers -- e.g. a Kickstarter campaign, bank loan, or VC investment doesn't diminish one's pride in the way that the same support from someone's parents might.
There's talk elsewhere in this article's comments here about the "killer feature" that these Indian Americans have. I would argue that the true killer feature is not even access to zero-interest capital. It's a culture that actively fights against pride and individualism.
There are surely tradeoffs, but it's hard to deny the power that can come from children and adults alike all looking to family for help... and seeing that help not as something which diminishes their power but rather as something that bolsters it.