[Users] Run once for windows xp vm very slow: correct?

[Gianluca Cecchi]

Hello,
I have a windows XP vm on f18 oVirt all-in-one and rpm from nightly
repo  3.2.0-1.20130123.git2ad65d0.

disk and nic are VirtIO.
When I run it normally (spice) I almost immediately get the icon to
open spice connection and the status of VM becomes Powering Up.
And in spice window I can see the boot process, that completes in less
than 2 minutes

When I select Run once it remains for about 10 minutes in executing
phase: see this image for timings comparison:
https://docs.google.com/file/d/0BwoPbcrMv8mvb3FIeHExVHFibms/edit

and in vm line, the status appears as down, so that I don't get the
icon to connect to console.
Only when it completes after 10 minutes, I get console link and I find
the VM already at its final desktop prompt

Is this expected or should I send anything to debug/investigate?