Darren Murph goes hands-on with the iPhone 4S:
Much in the same way that the 3GS improved the overall experience of the 3G, the 4S does likewise compared to the existing 4. The dual-core A5 chip is a laudatory improvement, and whisking about pages, loading the camera application and launching — well, just about everything — just feels zippier.
This is good, but unsurprising. I continue to tell anyone who will listen, don’t be disappointed by the iPhone 4S, it will be a worthy upgrade from any previous iPhone.