My Vista Base Score: 5.3
Over the weekend I loaded Windows Vista Ultimate Edition onto my 3 month old Dell Dimension 9200.
I wasn't timing it, but it was rather quick compared to installing Windows XP and other previous versions. Once I fine-tuned my device drivers and a few other things, I refreshed my Windows Experience Index which came back as 5.3.
I thought this sounded okay, but according to this article I found, I guess I'm right near the very top of the performance index - COOL! :-)
Although there isn't a huge amount of certified Vista applications, I'm running most of my development work via Remote Desktop and the VMWare 6 Beta release for Vista (seems very stable, by the way), so I'm good until Visual Studio 2005 and SQL Server 2005 come online (I don't wanna gludge it until the proper updates are released).
Update: I installed Vista Home Premium on my Dell Inspiron 9100 and the Vista Base Score was 3.8.

I just scored a 5.7 overall.. built my pc yesterday. e6600 core 2 2.4ghz oc'd to 3.4ghz. 8800gxt and 4 gigs of corsair 6400 800mhz ram
Posted by: Brandon | Wednesday, June 20, 2007 at 08:36 AM
My Base score is 5.9 (the highest score atm). I got Q9450 @ 2.66Ghz, two 8800gts 512mb SSC sli (820,2100,2300(core,shader,memory)), 8gb g.skill 1066mhz memory 150gb WD raptor 10,000 rpm + 500gb WD sata II
Posted by: Ben Bradnick | Thursday, May 15, 2008 at 03:27 PM
my base score 5.6
Posted by: Zee | Saturday, November 22, 2008 at 02:45 AM