I participated in a few Google critical discussion in the past few weeks and a surprising number of them were killed for no apparent reason. They were lively, non abusive discussion, they just happened to be slightly critical to Google.
Since I have never witnessed the same for any other topic, I concluded that the HN crowd doesn't like Google being criticized too much.
(amended original post)
Of course people will be biased both ways, but I never personally witnessed dead links on Apple, Facebook or Microsoft criticizing discussions, so that's my conclusion from personal experience.
I'm just saying that, by the nature of Google as a company and of this community, the crowd here is more likely to be favorable to Google and take their side on issues, and this is evidenced by my own experience.
People will always be biased, Google has always been a hacker friendly place so naturally hackers will like them and when you like somebody because you share their (true or perceived) values, you'll be biased in their favor.