But not because Google went about it wrong and screwed up its hiring process.
I've been now through a few hiring processes, have sat on Interviews, decision committees. And while I like to think that my Interviews and candidate ratings were spot-on (I correctly predicted one failure and one early resignation), I'm pretty sure that's just skewed by the small sample size. What I do know is that I went through all kinds of approaches, both as an interviewer and an interviewee. I've done brainteasers, role-playing, decision explanations, code walkthroughs, resume deep-dives, online candidate research, just shooting the breeze, and more. And I haven't found a single thing that strongly correlates with acing the interview or hiring a good worker. Resumes can lie (sometimes subtly), and you'll never find out without hiring a private investigator. Role-playing can confuse people, especially if they're trying to figure out what you're looking for. Brain teasers can be memorized, shooting the breeze can lead to unreasonable judgments (positive or negative), interviewers and interviewees can have a bad day, the other person doesn't like your first name, and a million other things.
Especially when you start talking 10s of thousands of interviews, you're actually looking at so much data, so many influencing variables that I doubt you can find one common variable that stands out from the rest. What I'm concerned about (and that comes partially from being married to someone in HR) is that there is still a drive to find the one process that will automate the hiring process. As far as I can tell, it doesn't exist. Well, let me walk that back a tiny bit: there's one thing that will work better than anything else: have the interview done by the best people you have, have them take it seriously, and spend some time on it. But it takes time, is fuzzy, and is entirely reliant on managers knowing who their best people are.
I'm glad to see that Google doesn't think Big Data is the answer to everything. I just hope that this percolates through to the rest of the HR universe. There's much too much of a drive to automate hiring, like performance reviews and firing has been.