Hmm, I don't feel like my iPhone 5S is that much faster than my iPhone 5. You don't really notice it that much except with things like launching the Camera , taking pictures in quick succession, or maybe playing a game like Infinity Blade III. It's faster yeah, but it's not something I'm blown away by. I guess because when I went from my iPhone 4 to 5 (skipping the 4S) it felt crazy fast but for this upgrade it's not really that noticeable. I was running iOS 7 on my iPhone 5 though so maybe that's why I don't feel like it's that much faster ? I'm not saying that the 5S is slow or anything, it's actually really fast and never laggy, I'm just saying that it doesn't feel immensely faster than my iPhone 5. I still love my iPhone 5S though and all the other features, especially the improved camera.