Not surprisingly since they kinda pooh-pooh on managers in the book: "We believe that these staples of work life - meetings and managers - are actually the greatest causes of work not getting done at the office". More context will tell where they're coming from, but they don't acknowledge the importance that great managers acting as leaders have in a project. I still haven't finished the book though.
Yes, and I remember when I was reading their other title: "Getting Real", and they make a point about being the "anti-MS Project" company. It's like educating people about your convictions by not telling who you are, but who you aren't. Looking at the quote you pulled in, it's clear they are holding the "anti-manager" flag now.