Not sure how it worked for you southern guys :P but for Northern Shaolin based systems the dummies were used more to condition the body, using actual fighting techniques rather than for teaching someone how to fight per se.
If you've ever read The Shaolin Authentic, written in 1925, you would see that most of the bag, dummy training was used to toughen parts of the body more than what you can accomplish by using a live partner. Head, fingertips, forearms, shoulders and hips were the big ones but the entire body was toughened up in this way. I think now the dummies are used more to simulate fighting because there are precious few people who want to train hard anymore. So the dummies take the place of an opponent, since dummies don't **** and whine about "illegal moves" or getting hit too hard. Even the Mui Fa poles were used to condition the body as well as to train stances, work on balance, etc. Many of the exercises on the poles were designed to train and condition the practitioner to toughen their legs and shins to the point where one could effectively use a stance to break the opponent's knee.
I've used the CLF dummy for years before I trained in mantis. I did some CLF and Pa Kua Chang prior to my mantis years. Using that spring arm to work grabs and traps was an amazing skill to develop. When I got into mantis my Kiu Sao was light years ahead of my peers as a result.
On an unrelated note, Chris, have you ever learned the Lohan Gong Qigong exercises? I have a book written by Wong Hun Fun about it that was sent to me from my kung fu uncle in Hong Kong, who has taken over mentoring me in mantis.
I have that and the Yi Chin Ching (the old way) available electronically to qualified people.