Thanks, Nell. My knitting is not generally tight, so my dishcloth would come out smaller. I don't think that there's anything wrong with that. On the other hand, I can't let go of my "old" way eben though it is only knitting, and the rules for a dishcloth are not set in stone.
I already stopped making them the MDK book length, and gollow the length for the original instructions. This was after I gifted a friend six of them gir her birthday and she gave me a 15 minute dissertation on how I could improve on making them. They were apparently not thin enough to wash her mother's good glasses (I suggested she use "Handi Wipes" for those).