I have interviewed with Google. It's not explicitly tested for but you can be sure the interviewers will have an opinion of your character.

Also, (in the middle of six hours of interviewing) for lunch I lunched with someone completely outside of the particular group I was interviewing for. Rather genial chap and I'm sure his opinion was sought too.

I'm not downplaying the tech questions, I'm saying there's a meta/side evaluation as well.