The claim is that, despite increasingly visible/vocal attempts at diversity, the industry does not reflect this. We've noticed a regression in black/Latino hiring and stagnancy for Asians. This implies that there is racism at work.
The angle of the study, if not the actual result, is already a foregone conclusion considering it's from an Affirmative Action-lobbying organization but even then some of the complaints are a bit nonsensical (hard to know if it should be chalked down to the Guardian or the actual report though), for instance that it's twice as likely to find white men and women as CEOs than asian ones, when the amount of whites are fourteen times the one of the asian population in the US.
Does it though? Or does it suggest that the problem is not (just) racism, and that all the noise is making it harder to identify and solve the root problems?
Just because a company goes on a PR campaign to openly discriminate based on race and attempt to hire minorities, does not mean more minorities will present themselves in the application pools.
Again, until urban minority cultures begin to value education - nothing will change.