Expect even better results when SP1 is released
How much better do you estimate?
A guess based on the information currently published would be 20%
Now before you go jumping up and down, 20% assumes the system is not being overtaxed as it is and is properly set up with the sliders to begin with... and is running hardware that was designed to do the job
So assuming someone like John (miltest) who has correctly set up thier system and sim, has not hacked anything and is getting about 12-16 frames in cities and 22 outside urban areas, he can expect to see 14-19 in the city and 24 outside urban areas. I know he is already pushing the limits of his system so I would say a more reasonable number for him is 13-18 city and 24 in urban
You may ask why only 24 in urban with a base of 22 + 20%.. because he knows setting above 24, if he can get that far, is -not- making the sim any smoother and the extra resources the 20% may provide will go to producing better screen quality and scenery, such as increasing traffic and other little tid-bit goodies.
That is not set in stone either. It will depend greatly on how much CPU bound calls they change and how they change them