Peretti is talking about the quality of the ad service, not the quality of the ads themselves. Peretti is suggesting that maybe Google's service isn't anything

Peretti is talking about the quality of the ad service, not the quality of the ads themselves. Peretti is suggesting that maybe Google's service isn't anything special, and their success is due to their insanely large audience. The comment you replied to goes even further to suggest there's no real talent to serving ads at all, and that everything depends upon the audience size. That's not just semantics.