I wonder if they had the XPS M1730 running in SLI for the tests?
When I first got mine I ran 3DMark06 and got a score of 4861 which I though was OK at the time as my desktop machine only got around 5600 running an FX60 cpu and a 7900GTX. BUT upon further checking it turns out that the laptop is shipped without being set to SLI. Once I figured that out I set it to SLI and I repeated the test and got 8308 with my XPS M1730. Yes I am running Vista Home Premium with 2gigs of Ram and the X7900 Core Duo Extreme CPU.
Almost forgot to add that I am NOT overclocking the unit either.....

When I first got mine I ran 3DMark06 and got a score of 4861 which I though was OK at the time as my desktop machine only got around 5600 running an FX60 cpu and a 7900GTX. BUT upon further checking it turns out that the laptop is shipped without being set to SLI. Once I figured that out I set it to SLI and I repeated the test and got 8308 with my XPS M1730. Yes I am running Vista Home Premium with 2gigs of Ram and the X7900 Core Duo Extreme CPU.
Almost forgot to add that I am NOT overclocking the unit either.....