I found this tweak somewhere (i'm still hunting the source). Basically it speeds up apple's animations, giving a seemingly faster device. I currently have mine set to x 2.0 however you can go up to x10.0. Here's a youtube video which shows it in action. This is probably one the best tweaks so far, i'm incredibly impressed! No effect on battery life, makes my heavily jb feel like stock Give it a shot i think you'll be suprised! EDIT 2: This is a mobile subtrate addon. A very light one at that. Also as THE dAY has pointed out some apps & games may be affected however this depends on the speed set. Generally speaking though in games it's usually unoticable.