Lots of good points made in this. We have eradicated the usage of the exclusive terms in our team not recently but well before 2014. It's a cultural change to be precise. We are very conscious of the biases that could arise. In fact, during hiring we specifically ask the recruiters to look for diverse pool of engineers.

Still I concur with the OP's statement that the percentage of African American in the tech industry is marginal (in the US, not sure elsewhere). I don't know what we can do about this. But we have to change as a society and as individuals.