No. If you read Owen Taylor's mail, that has been made explicit. A release note update pushed as soon as soon as we were aware of the changes needed to revert it.
Fedora 12 to remove unprivileged package installation
Posted Nov 20, 2009 7:26 UTC (Fri) by bojan (subscriber, #14302)
[Link]
Yeah, that's the thing I wasn't sure of, whether there actually was something in the notes or not, because the documents are on the web and they are subject to change. I don't remember seeing anything, but I didn't read every single line (I upgraded a few days before the official release).