The YC article suggests that black and hispanic founders are slightly more likely to be funded by YC than other ethnicities. 3% of applicants to the batch were

The YC article suggests that black and hispanic founders are slightly more likely to be funded by YC than other ethnicities. 3% of applicants to the batch were black or hispanic but 7.7% of funded founders in the batch were black or hispanic. The article you linked does not seem to adjust for demographics of the applicants, it only discusses those who were funded.