3d mark scores dont tell a thing. I feel Nvidia are pretty confident they have a superior product compared to their rivals ATI, hence such low clock speeds. It seems to be a rehash of 1 year back when Nvidia pulled a rabbit out of the hat with Nv4x and ATI had to rethink their strategies.
The story will go as thus Nvidia will release G70, ATI will introduce a bruteforce R520, which wont be available in mkts for quite some time. Till then the 'slower' G70 would have picked up sales. To negate that ATI will introduce a powerhouse midrange card. And the stories continue.
Not to forget now all the Nvidiots who will cry hoarse with 3dmark 2005.