From the link from the guy had the phone for a week to test it "The iPhone 4S now comes with the same, dual-core processor found in the iPad 2. I didn?t notice a dramatic speed gain, but the phone operated rapidly and surely, with smooth scrolling and swiping"
He didn't notice a dramatic speed gain? I don't like that at all. Optimization or not RAM is RAM. And smooth doesn't outperform RAM. When computers went from 256, 512 RAM to 1,2,3 RAM the differences were very noticeable.
Josh