Fred Pearce has an article on the IAC report in New Scientist.
The IPCC has tried hard to preserve the normal rules of scientific discourse and to explain continuing uncertainty, but it has been pushed towards simple sound-bite conclusions. Some of this pressure has come from the desire of many scientists to underline their concerns about the dangers the world faces. Sometimes, in the process, "could happen" has become "will happen", and analysis has veered close to advocacy. Journalists have been willing colluders.