I upgraded from the 3GS. The difference in processing speed is very noticeable. I used to have some apps lag the keyboard input because they were taxing the pr

I upgraded from the 3GS. The difference in processing speed is very noticeable. I used to have some apps lag the keyboard input because they were taxing the processor. Updating apps took awhile, and some opened slow. All that goes away thanks to more speed and dual-core; it is almost worth it just for that.