Earlier quoted context omitted.
Sure but the Flynn effect is just something measured and could well just be a 'low hanging fruit' environmental gains that will/already have run out.
What mythical better times are Idiocracy theory proponents even mourning? When have literacy rates and educational attainment for the masses ever been better than the present? As a species, we still have a long way to go before the low hanging fruit gains are realized.
With grade inflation and babysitting modern age students, what are the realistic requirements to attain a university degree in a low-difficulty major at a mediocre school? 80 IQ? 85?
The literacy argument is trivially refuted in a similar manner. Reading by itself is not indicative of higher cognitive function above an elementary school child.
Also, proportions are what matter here. I doubt the proportion of people with high fluid/crystallized intelligence is higher now, than it was, say in 1850. The only difference is that now a higher proportion of the general population have degrees.