An insidious effect of racism is that one can explain any negative interaction through that lens if one is inclined. Based on her post, I don't actually see racism, I see someone with a stronger background and more bona fides being more successful at pitching than someone with less of those things. In most other situations, HN commenters would be saying something like 'anecdotes are not data'. I think it's hard to draw large scale conclusions of a 'different reality' from this.