I have no strong opinion on Gebru, but... it's so easy for a random person to make a throwaway account on Reddit, and these comments don't have any specific info to suggest they are anything more than that.
One of the replies further down had a more concrete example. I did not see any Googlers refute it:
To give a concrete example of what it is like to work with her I will describe something that has not come to light until now. When GPT-3 came out a discussion thread was started in the brain papers group. Timnit was one of the first to respond with some of her thoughts. Almost immediately a very high profile figure has also also responded with his thoughts. He is not Lecun or Dean but he is close. What followed for the rest of the thread was Timnit blasting privileged white men for ignoring the voice of a black woman. Nevermind that it was painfully clear they were writing their responses at the same time. Message after message she would blast both the high profile figure and anyone who so much as implied it could have been a misunderstanding. In the end everyone just bent over backwards apologizing to her and the thread was abandoned along with the whole brain papers group which was relatively active up to that point. She has effectively robbed thousands of colleagues of insights into their seniors thought process just because she didn't immediately get attention.
The thread is still up there so any googler can see it for themselves and verify I am telling the truth.
To give a concrete example of what it is like to work with her I will describe something that has not come to light until now. When GPT-3 came out a discussion thread was started in the brain papers group. Timnit was one of the first to respond with some of her thoughts. Almost immediately a very high profile figure has also also responded with his thoughts. He is not Lecun or Dean but he is close. What followed for the rest of the thread was Timnit blasting privileged white men for ignoring the voice of a black woman. Nevermind that it was painfully clear they were writing their responses at the same time. Message after message she would blast both the high profile figure and anyone who so much as implied it could have been a misunderstanding. In the end everyone just bent over backwards apologizing to her and the thread was abandoned along with the whole brain papers group which was relatively active up to that point. She has effectively robbed thousands of colleagues of insights into their seniors thought process just because she didn't immediately get attention.
The thread is still up there so any googler can see it for themselves and verify I am telling the truth.