Is it normal that when scrolling through any of the settings menus-more so with the usage page that has icons-that the scrolling is slightly choppy? I mean slightly as not bad at all, but I got a replacement 4S and don't recall the first one being like this. Both of the 4's in my office are a bit jerky or stutter ever so slightly when scrolling up and down in the settings page. If you flick your finger fast and take it off the items scroll up or down perfectly smooth, with the finger on its rougher so to speak.