Here's the quick reason why some people are upset about the iPhone 4S. It's not called the iPhone 5. Really, that's it Admit it.
It was your first knee-jerk reaction when the iPhone 4S event ended and there was no "one more thing". You were like "where the iPhone 5?" I admit it, that was my initial reaction.
But after I've let my emotions to run its course and started thinking with a clear head, I thought "hey, not a bad upgrade at all".
Slightly longer battery life, faster CPU and gobs more graphics for gaming, Siri (voice assistant), faster connectivity (depending on the carrier), vastly improved camera, and better overall performance.
You get the same first-rate form factor. What's not to like?