Yea, I know. Seems like a lot but from what I've read lately that is a generally accepted cut-off point for the middle quadrants of the income distribution. Of course it comes down to definitions as well. Certainly, a single earning 100K is different from a family of 4 bringing in 100K. The link I've added gives a pretty good explanation of this.
https://www.investopedia.com/financi...s-are-you.aspx
One can be sure that he who says he knows knows nothing