While I don’t think Summers really handled his own situation very well, I don’t find fault with him for his remarks which I still don’t think were totally wrong from a standpoint of being factually accurate. All his talk of variance and extremes seems pretty reasonable to me, but his delivery of it is what I think got him into trouble. But this is not about Summers, this is about poor kids sucking at finding triangles.
I think while it is possible there are genetic differences (hell, I think there probably are) I don’t think this study is really about that. All it is saying is that poor kids are doing poorly on this test. Are you pulling a Summers by saying that poor people are dumb and that’s why their poor kids are also dumb? I think that’s not so much pulling a Summers as it is just saying something pretty silly and worse still, difficult to back up. Unless it’s not, but I would imagine that you will have some trouble finding credible research to support you there.