That was my thought as well. Judging from the article, the model they have has statistical significance, but small predictive power. "But in the past couple of

That was my thought as well. Judging from the article, the model they have has statistical significance, but small predictive power. "But in the past couple of years, larger studies relying on new statistical methods finally have produced compelling evidence that particular genes really are involved in shaping human intelligence." and "But all of these genes together account for just a small percentage of the variation in intelligence test scores, the researchers found; each variant raises or lowers I.Q. by only a small fraction of a point." That doesn't sound like a compelling result, or an enormous success to me. I've taken a few IQ tests in my life and my own variation between tests is more than a dozen points. If they were showing genetics accounting for a meaningful amount of change in the IQ score, then yes, but in low predictive power models, I'd be more likely to look to a confounding variable with those genes that wasn't Intelligence. (e.g. certain genes express more when people eat a nutritious diet growing up - the study mentions that these genes in question are tied to regulating brain cell development).