Actually, we're doing a lot better now than we used to be, as IQ scores seem to be increasing over time. As much as any such observation may have been measured

Actually, we're doing a lot better now than we used to be, as IQ scores seem to be increasing over time. As much as any such observation may have been measured correctly, it doesn't logically follow that intelligence itself is increasing, because of a variety of factors. The link you posted provides some of them.