I don’t believe this is a meaningful distinction when we’re not going to agree on how to judge performance of software engineers. If this were solely about income, it might be an important distinction.
The article assumes a normal distribution, making the distinction moot
But it is useful to question whether that is true in all cases. The cases that aren't normal-distributed might be exactly the cases where it pays off to be neither average or median
there is a major shortcoming in this assumption; everything we've seen related to the internet and technology in general suggests there is rarely a normal distribution. I think it's way more valuable ato frame the questions as a long tail (pareto) distribution and a "good enough" cut-off point.