The GM is noticeably faster than beta 5. Battery life dropped 2-4% overnight. That being said, it's a tad bit slower than 7.1.2 but hard to tell as of now. The folder open animation stutters a tiny bit on first open but subsequent requests appear to be fine. Opening apps is slower across the board but it wasn't that great under iOS7 either. (3 seconds for music app - ~2500 songs)