I idiotically misread the chart posted in the post. I originally thought the chart under ( https://cdn-images-1.medium.com/max/800/1*F9MLGQLTU2HZD4In6o... ) wasn't normalized to anything; but upon rereading i found that the top row is the comparison row and represents the percentages of working force age us citizens in the tech industry, which Twitter with its 1% falls far below.
I'm sorry for my mistake.
My original post below for context for the replies made to it, but which is otherwise useless.
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It's alway a little confusing when people bring up diversity reports that aren't normalized to an appropiate comparison metric. (Possibly local demographics, or any number of more in-depth metrics. I also earlier suggested applicant demographics, but justizin pointed out those are not feasible.)
Also see: https://xkcd.com/1138/
To bring it into contrast with the article, he says:
"<5% make up engineering and product management combined."
According to this census report: http://www.bayareacensus.ca.gov/counties/SanFranciscoCounty....
Race - Black or African American 48,870 6.1%
The twitter numbers are thus a little below average, but not necessarily unexpected given where Twitter's headquarter is located.
Edit:
According to this, Twitter has roughly 30% asians: https://blog.twitter.com/2014/building-a-twitter-we-can-be-p...
Which seems to fit the census as well:
Race - Asian 267,915 33.3%
Another Edit:
To clarify, i am not saying that there is no problem. I'm merely saying that in order to solve a problem, one must both set appropiate goals, as well as correctly identify the root cause. Both of these can only be done usefully by applying statics correctly.