I’m not sure that’s true. It’s true in the sense of being around where the mode is for the distribution of incomes over 100k, but people (I know) tend to not like boasting about money, either out of humility or some expectation that they might be taken advantage of for revealing a high income, so they may be happy to understate it. I don’t think 100k is elite enough anymore (most programmers in the US, managers at some fast food stores, etc) for the difference between 100k and 500+ be an insignificantly polite downgrade.