It's not pseudoscience and I suspect we'll have firm genetic proof that this has occurred. However, it is so slow it likely won't matter. Genetic engineering for increased IQ is looking like it will be easier than anticipated. Hell, even embryo selection would give us 8 points per generation. Should be possible as soon as we have about a million genomes tagged with their donor's IQ. This would make quick work of any dysgenic trend. However our civilization is so self-hating and in such denial of the biological realities around intelligence and reproduction that I suspect we'll be a generation behind Asian nations when it comes to widespread use of such technology.