I don't have a link handy. I believe it's not from one particular study, but rather various samples from Israel that were used in IQ and the wealth and Nations and an updated follow on study from that book.

One thing that stands out to me is this. There are supposedly something like 6 million AJs in the US. That's a pretty large number. Yet the samples we are talking about when these high IQ numbers pop up in some cases consists of just dozens of people. Larger samples from the early 20th century are apparently just thrown out as conveniently unreliable(and not surprisingly these are ones that tended to show AJs as below average). So we aren't talking about samples of hundreds of thousands, or tens of thousands, or even thousands. We're talking about a handful of studies, each usually comprising like dozens of people, taken from things like Jewish private school admission tests from the 1950s.

The OP lists some Wisconsin study that is supposed to be earth shattering because it has a sample that includes DNA confirming they had ashkenazi ancestry, but this is a strawman unless you somehow think there is an epidemic of people posing as Ashkenazi Jews and this somehow drags down their scores, but I've never realized that was a thing, or that it somehow adversely affected the tiny sample scores we do have. So the genetic confirmation of this small Wisconsin study is irrelevant. Much more relevant is the small and geographically specific sample of this study, which because of its small size and lack of wider geographic representation (from a state that isn't really known to have a large Jewish population) isn't significant. I'm also curious what else this Wisconsin study shows. Were these mostly AJ's with German ancestry? Is the proportion of European DNA the same as AJs from say New York? And specifically what European DNA did they have and at what percentages? What the hell even is Ashkenazi DNA? My impression is that Ashkenazis are mutts. I hear around 25% non European-be that "khazari", "semitic", or whatever- but then I also hear they have some genetic similarities to Southern Italians. Is that Southern Italian like DNA considered part of the 75% that is European? It all seems to be subject to the whims of what the particular Jews conducting the studies prefer the truth be, or prefer to emphasize. Ultimately I don't even give much of a shit. I dont find Jews to be particularly interesting, although their massive wealth and influence, and the consequences it brings, kind of forces you to give a shit.

What the actual truths are regarding Ashkenazi genetics and even intelligence are less important to me than what Jews themselves believe and how it shapes their modern day behavior.