Author aside I thought this was a very interesting answer to a question I didn't know I had.

I had been thinking that sending my children to a school with high achievers could leave her at a relative disadvantage but this data would seem to say otherwise.

I wonder if this conflicts with Malcolm Gladwell's observations on one's relative ranking when it comes to college matriculation (that its more important to be at a high percentile of your institution than your global rank)

One of the unintended but hard to avoid consequences of a high competition education environment is a lot of broken kids. Dealing with constant pressure and failure is hard even for adults, for some children it's literally fatal. Don't forget to consider this as well

After looking into the author a bit. Ugh

What is the answer that you found? All I see is a marginally defensible claim in the 24th paragraph. I stopped reading after that, although there were only a few paragraphs left.