He's saying that people complain about being turned down by Google after phone screens and say that the interviewer never even read their resume. For example maybe they applied for a sysadmin position and their resume was full of relevant experience and no college, and the phone screen leads off with a hardcore CS theory question.

So if it's the case the interviewers don't read resumes prior to phone screens, then the odds are low that they discriminated against this guy for age-related reasons.

However I suspect the truth lies somewhere in between - e.g. sometimes interviewers don't read resumes. I doubt it's an all or never situation.