"This isn't the best way of showing the speed increases that come along with the iPhone 4S, but it is one of the ways that the iPhone 4S' faster A5 chip will immediately be felt: in significantly shorter app launch times."
It might not be the best way, but seeing it side by side does make the point.
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iPhone 4, 1.6 GHz Core 2 Duo MacBook Air, Apple TV, 2.66GHz Intel C2D Mac Mini, 1TB TC, Airport Extreme,several iPods and an iPad, 32GB Wi-Fi version. Follow me on Twitter.