Can the QPropertyAnimation update interval be increased for ultra-smooth animation?

Question

The new Animation Framework in Qt 4.6+ is based on QTimeLine which has 'void setUpdateInterval(int interval)' public function. Based on QTimeLine as well, QGraphicsItemAnimation could access this function, but the new animation framework classes (e.g. QPropertyAnimation) can't! Is the animation framework locked to the about 60 updates per second which corresponds to a pixel-by-pixel transition of 60 pixels on screen per second only (for QPropertyAnimation animating position property) or is there a way to increase this without reimplementing everything?