I've seen some threads about the difference between the 4 and 4S. I personally think there is a huge difference, not just in app load times, but one other key area that many have overlooked: Smoothness. This of course stems from the dual core GPU. In addition to the dual core CPU, there is a dual core GPU, with 7x graphics performance as we have all heard. Well my friends, this makes a huge difference with the user experience. Everything from scrolling in the Music app, to webpages, transitions, even the folder opening animations, is so smooth I can hardly believe it's real. It really makes a big difference, and is very noticable once you are used to the 4S. This is something that might not be instantly noticible, but it's there. Also, when you put a 4 and 4S next to each other and start running a bunch of apps, youll notice decreased load times, stuttering, and lack of smoothness with the 4. The 4S is a powerhouse, and the more you play with it the more youll get used to that power.