> No I don’t agree that heritability of IQ is well established
> Although IQ differences between individuals have been shown to have a large hereditary component ...
You have written both statements ...
> Although IQ differences between individuals have been shown to have a large hereditary component ...
You have written both statements ...
It has been shown from biased studies that IQ has a large hereditary component, where these studies failed to account for genetic × environmental interaction and covariation.
By the way the wikipedia article it self goes into these nuances and caveats. Reading it, it is pretty clear that there may be a large inheritance factor to IQ, while at the same time large IQ differences between individuals have no genetic basis.