Diversity is important topic, but I encountered, that you sometimes are too sensitive. I don't think, that comments like "You write a pretty code, because you are a girl" can be sexist - it can comes from fact, that we treats female as "the gentle sex" and - in men opinion - you are more exact. But - once again - your talk was about really, really important topic :)
First time I had a chance to listen Michiel's talk. Presentation was well prepared, speaker didn't annoy people and was able to "sell" this subject. And it seems, like he really know what he was talking about :) congratulations!