I'd say that's mostly accurate. Upgrading a live site right now is a gamble. Everything may work fine or you may have lots of problems and have to spend some time elbows deep in the database to fix things. I was working on a site this past week that had a little bit of the latter case during a Views/CCK/Date/Calendar upgrade from Alpha versions to more recent versions but that was a known risk when the site was created.
If you want to help those modules get ready for final release I suggest trying to upgrade a test copy of your site to D6 and thoroughly record/report any bugs you encounter and helping to test any issues in the queue of the modules that are "patch (code needs review)" so that you can help the maintainers get the modules finished.
Thank you