"Beyond just disclosing our workforce representation statistics, we have also publicly disclosed our representation goals for women and underrepresented minorities for 2016, making us the largest tech company to put hard numbers around its diversity commitment."
Are they unaware of Intel's diversity initiative? Intel has set hard goals for 2020, and is continuing to track metrics yearly [1].
To claim that one is tracking the state of the art, and simultaneously be so unaware of what the state of the art actually is, is a sign that an organization is languishing, regardless of what the subject is. In this case, the subject is diversity, and the organization seems to still be Twitter.
There are ways to avoid these kinds of issues: if you run an organization that you want to build a diverse workforce in, I recommend that you hire a diversity consultant. (I believe that Clef, for example, did approximately this, and got staggeringly good results.)
[1] http://download.intel.com/newsroom/kits/diversity/pdfs/Intel...