The full TL;DR of that article is that Jews are "the new WASPs" (e.g. are over-represented relative to recent performance on measures like STEM competitions) and both Asians and non-Jewish whites are "the new Jews."
The author suggests that top Asian students are being discriminated against (implicitly or explicitly), and it's unclear whether top non-Jewish white students are being discriminated against, or whether they apply in much smaller numbers to the Ivies.
Which part of the article says that Jews are over-represented? It says that blacks (and, to a lesser extent, Hispanics) are over-represented, but all it says about Jews is that they were under-represented and that this effect starting fading in the 50s.
I assume you're referring to the Priceonomics blog post, while the comment you replied to was talking about Ron Unz's article in The American Conservative.
In the article from The American Conservative, the claim that Jews are over-represented is rather hard to miss.
The author suggests that top Asian students are being discriminated against (implicitly or explicitly), and it's unclear whether top non-Jewish white students are being discriminated against, or whether they apply in much smaller numbers to the Ivies.