Looking at the results on page 7 of this link:
The X1600xt results are a little odd. When you consider how poorly this card compares to a 6800GT in pretty much any game, yet it is nipping at the heels of the GT here.
When you also consider that the rumoured specs of the X1900 are very close to the architecture of the X1600xt but with 4x the amount of pipelines/rops, I would guess this version of 3dmark is going to become an ATI propaganda tool when the new cards hit.
Hope im wrong, but seems suspect.