I second this. I just finished interviewing on-site at Google. The phone screen was fine -- I was given a link to a Google Doc ahead of time. Audio quality was fine and the interviewer was personable. I actually found the on-site interviewers to be significantly nicer than other places I've interviewed at. I mentioned this to one of them and he said that all interviwers are required to go through special training. This was on the main Mountain View campus.
My impression is that bad interviews are the exception and get disproportionate attention. Glassdoor interview ratings for Google are 54% positive, 26% neutral, 18% negative. http://www.glassdoor.com/Interview/Google-Interview-Question...