80% - 90% of the items listed in the release notes aren't interesting to users, but *which* 80% - 90% it is varies. The release notes don't have to function as a press release, because we'll have an actual press release instead. -- Peter Geoghegan
I think Peter's point here is really important. I read the release notes and the press releases, both, from a very different perspective than others, but I find both very valuable. The release notes benefit from completeness and detail, in my observer's opinion.