I never said they said anything, I'm saying that there's no reason to waste energy and make Al Gore cry by drying them. you can hang them on a hanger dripping wet, forget about them overnight, and they will be fine and dandy.
They're supposed to go in the dryer . . . otherwise, they don't come out all that wrinkle free. I have a fair number of BB non-iron butondowns, and wash and dry them frequently. They're great, I haven't noticed any shrinkage or durability issues in comparison to regular cotton BB shirts.
After about 5-10 washes, they lose a bit of the non-iron stiffness, yet still stay very wrinkle resistant.