Interesting study. I printed it out to show the neuropsych. I'm taking DS in for more testing in a week. My DD does not have DCD but does have ADHD and her handwriting is significantly improved when she is medicated properly. Last spring she was on the wrong medication and her teacher said her work is extremely sloppy. We changed her meds over the summer. She just brought home a cursive packet with handwriting that was so perfect it almost looked like calligraphy. Her teacher who is so critical of everything wrote on the top "ABSOLUTELY BEAUTIFUL!" This is a girl who is a total slob in every other aspect of her life. It probably took her 5 times longer than everyone else but hey, at least she wasn't sloppy!
DS has some aspects of ADHD (not sure yet if he has it) and I would love to see if his motor coordination improved on medication. He does seem to rush through writing and not put much effort or concentration into it.