Maybe you can clarify my situation a bit with your experience. I've passed the Google interviews according to my recruiter, and have been waiting for a team matching interview for about 2 months now. Even though I passed, I have a feeling I didn't do particularly strongly in the interviews, since I made some mistakes, needed a few crucial hints and didn't have time for a second question in one interview. Also my CV is likely not as strong as many other applicants, since I didn't graduate from a top tier university.
My theory is that my file is going around from a hiring manager to another, and since the economy seems to be tightening, probably they have less openings than a few months ago. So they've become more picky about who to interview from the pool of possible candidates.
I've been pinging my recruiter regularly, and they keep telling me all is fine and they'll let me know when they have news. It's been rather frustrating to wait without knowing what's the process like and what to expect. I've read about people waiting for a team match for months, but also I know from following appropriate forums that someone was hired in this location on a much more hurried schedule.
So I guess I'd like to hear your thoughts about what happens after you pass the interviews and how likely it is that a "mediocre" hire goes through the interviews, but raises no interest of hiring managers.