I had the same reaction, but when he got to the point about the Hard Yes (+2) and Hard No (-4), I assumed the number of interviewers was closely tied to having enough of a sample size to using this scoring system effectively.

But yes, I agree that 8 people is a crazy amount of interviews. In this market you can't expect to do that unless you either have a stellar reputation and an influx of excellent candidates that you're trying to sift through.

Very few startups are in such a position today.