"At Intel Notebooks you will notice the Fans spinning full speed while the Screen Saver is running. This is the case with almost all bigger Quartz Composer Applications and is a normal behaviour"

Nonsense. I have seen and used many Quartz Composer-based screen savers and none hammered the CPU like this one apparently does.

One more thing: Beware of visiting his web site--it will zoom your browser window to full screen. How presumptuous and rude!