Personally, I think Google's recruiting process can become very long and tedious. I interviewed with Google 4 months before my graduation and went through 6 different interviews (all technical) for two different positions. The HR person told me that she would like to schedule another hour for interviews and took my availability for next 2-3 weeks. I got no response back. I contacted the HR person again, and she told me that they were going through reorgs and things were getting lost. She then took another 2 weeks of availability. No response. I didn't have much time to wait any longer, I decided to join another company.
From friends and colleagues who interviewed and/or are working at Google..I found out that the interview for college hires can become very long. One of my friends took 6 months to get a job. If this is still happening at some part of Google, they must improve this process. People don't usually have time to wait 6 months to know whether they got a job or not.