That's a lot of load time

So,Cars. Comes out soon. John Lasseter. Directed Toy Story and A Bug's Life.

This is unbelievable:

Moving the car characters and adding realistic reflections and other details posed formidable problems. " 'Cars' was a really difficult film technically," said Ms. Anderson, the producer. "It's the most complex film we've ever made." Even with a network of processors that ran four times faster than the ones on "The Incredibles," each frame of "Cars" took an average of 17 hours to render.

17 hours? For a frame?

That would mean, at 24 frames per second (film), each second of movie would require 408 hours to render.

I can only assume they have render farms set up for this sort of thing, but seriously? 17 hours?