There was no other software installed. Just the base os and all the current updates.
At least with my system, it seems Vista is only about 2% slower. Not the 50% most websites or blogs are posting. Even on my Core 2 6850, 2GB DDR2 1333 and SATA II drives, and a geforce 8800 GT 512, my findings right now w/ Vista sp1 rc refresh, is that Vista is less than 5% slower. Maybe it will be less than this in the final service pack. The only thing that I know for a fact, that is slower, is waiting for programs and downloads to finish. They seemed to sit there a bit longer than they should. I thought I heard it had something to do with the shadow copy, but not totally sure.