That's a decent score for a GTS 32 meg at default speed and a 1.2 gig T-bird.
I got something like 8750 or so with my 1.2 at 1.4 and a GTS 64 meg overclocked by about 35 mhz for the core and about 80-90 for the memory.
Do you have 3dmark 2001? Its tests are a lot harder and use more functions/features on midrange-high end kinda systems (like ours) than 2000. I get 3950 or so on that.