Reminds me of the campaign a few years ago to have fire engines lime green, because that is where the human eye is most sensitive. Turns out they're right, the eye is more sensitive in the green part of the spectrum because IT NEEDS TO BE. All the greenery in the world, adn we humans need to be able to tell it apart. Not much in the world is naturally red, so that which is really stands out. That is why we use the color for warnings, stoplights, and fire engines.
Another psuedo-science idiot.
If you want to save paper/toner, DON'T print. Many years ago the "paperless office" was put forth. Now we print more things than ever before. If everyone went back to carbon paper and typewriters, we would save more than a silly font full of holes. Besides, it makes NO difference on some (thermal) printers.