I've done the same (50 resumes for two positions, phone interviews with 15-20, follow-up in-person interviews with 4). That's 10X interviews. But 100X? Assuming anyone he hires goes through multiple follow-up interviews, I don't see what information he's getting from these interviews that couldn't be handled by a subordinate or by email. Evaluating someone for "fit" is impossible in a short interview like that.