Usually there is coordination between the release engineering teams and the port maintainers. When a release is anticipated, a code freeze usually ensues and the bugs in the existing code base are addressed. OpenBSD just completed a ports code freeze which took about 5 weeks. I may not know where to look but I have not seen anything about a code freeze for 9.1 ports. It would be nice to get some feed back as to the problems, beyond the security breach last year, with getting the build servers back up and what kind of time line they anticipate. I waited about a week after a fresh 9.1 install for binary packages, gave up and encountered alot of buggy port builds.