fps overall on this device is in my opinion on unacceptable level. Sometimes it is almost smooth but still gets little jerky. Its just one thing that irritated me after i had used iphone. With one program running. But after awhile you forget it Actually i have had this same problem with different distros on pc and different hw....I'm starting to think that xorg or display drivers are not optimized and there is some really big problems with vertical sync or some other thing.