[fiachamp]

In orgs I've been in the daily standup was clearly intended to help people get a heads up on who can help them with blockers or may be working on a similar part of the codebase that day. It also helps PMs know what kind of support they'll need to give their dev team that day since they often get pulled into meetings by other parts of the company.

As far as timeboxing, the PM is timeboxed by having stuff in good enough state of definition that their devs feel they can work on them. So if you don't have your specs there by the time sprint planning happens, your projects don't get done and you risk your job. Of course, we have an issue if the PM is writing shitty specs and not around to help answer edge case questions.