https://www.sciencedaily.com/releases/2022/07/220721204906.htm

But 50 years after the seminal "marshmallow test" suggested this, a fresh, multicultural approach to the test adds a missing piece of the story: What kids are willing to wait for depends largely on their cultural upbringing.

The CU Boulder-led study, published in the journal Psychological Science, found that children in Kyoto, Japan, waited three times longer for food than for gifts, whereas children in Boulder, Colorado, waited nearly four times longer for gifts than for food.