Summary: It seems to me that Canon is pushing everyone to use as much toner as possible. Smart guys from Canon decided that the job of driver is to deliberately worsen the quality of the print. When I first saw the rasterization patterns the driver uses for printing in eco-mode I puked all over myself. I have not seen such dots since matrix printers were around. Whom are they taking us for? The second thing I wanted to try was a sequential printing on both sides. Nope.