So I own a 3G / wifi 32 original iPad ... Bought in 2010. It works great, iOS 5.1.1
I've noticed that at certain times, especially at night, between 6-midnight and slightly past , that my iPad not only gets really fast wifi speed, but also the screens resolution is slightly "crisper" than usual..... More "hd" if there is such a term .... Icons look sharper, Colors are sharper, even letter, text, etc... Appear to be really crisp, sharp.... Even home page icons seem slightly tighter, smaller, very clean and crisp and clear, extremely sharp. Even the screen keyboard type action is tighter and "less sluggish".
I know it sounds crazy, but I assure you, this occurs. Then, in the morning, it's back to normal,,then repeats at night. Wt.... Is going on?