You are wrong. 1) QT works better when you not have accelerated drives (ie SVGA driver in X11) 2) The time in Nokia, QT was optimized to run in a mobile !! So

You are wrong. 1) QT works better when you not have accelerated drives (ie SVGA driver in X11) 2) The time in Nokia, QT was optimized to run in a mobile !! So must they tuned it to be more lightweight.