In the Feature List Accepted Features (http://fedoraproject.org/wiki/Releases/9/FeatureList), Xen paravirt_ops should say 50% or less, instead of 100%, since Dom0 XEN is NOT working in Fedora9, since it's description includes Dom0:
"Replacing the current forward-ported XenSource code on kernel-xen by a paravirt_ops based implementation, including dom0 suppor" - 2008-04-07
Acording to http://fedoraproject.org/wiki/Features/XenPvopsDom0, Dom0 is at 30% still.