Interviewed in-person at my school's campus after about 4 weeks from initial contact. Had 2 back-to-back interviews. Then waited 2 weeks before hearing back.
My interview experience was really defeating and not positive, but from what I hear, Google is notorious for having some really inconsistent interview processes (since it is so large). I know they don't try to make this the case, but that's just how it happens. Best of luck to you if you attempt - it's all about luck with who you interview with. This was my second time applying for this position (the first was similarly not great, but I have some friends whose interviews went really well.