But so is the idea that you have a test that demonstrates that the new Safari builds are "above 15 times better performance than Internet Explorer 7 in the same system".
Seriously, that's just stupid., and renders the index meaningless.
Why not just multiple the index scores by 10? Then you can claim Safari is 150X faster than IE7.
Without scaling the index into a range that meaningfully communicates (or at least correlates) to user experience (which things like FPS and even 3DMark did for video cards), it renders the testing both invalid and irrelevant.