I was surprised at the lackluster results after minimizing my Javascript and CSS code (both Jquery), and commenting out all text shadows, box shadows, and border-radius.

Before minimizing or commenting out the above areas, cycling through 12 HTML pages took 38.15 seconds.
After minimizing and commenting out all of the above, 34.30 sec.

I used the YUI compressor for JS and CSS. This is for the iPhone. There is a white flash between pages.

I thought I would get more dramatic time savings across 12 pages. Should I have expected better?
Comments? Suggestions?