Hi
I'm running Vista Ultimate (32Bit).
I am experiencing as fast if not faster times with Vista than XP Pro.
It certainly has the feel of being faster.
Edit: I have removed all 'non essential' progs from startup. From cold to fully working is around just under 2 mins with offline defrag is running.
I have a PCI controller card (2 devices) & 4 HD's raided 0+1.