After reading this thread, I would have to say they probably had no overhead training. From their equipment configuration to their techniques, it speaks mostly of little training whatsoever. I am not a cave diver, but cavern cert. working on cave. Most cavern divers I have dove with who are practicing technique to further their experience to move on to the next step are consciencious of the limitations imposed upon them and the delicate nature of the environment they seek to practice in. Dedicated cavern divers seeking to become cave divers would not jeopardize the very thing they are wanting to accomplish. Whenever I encounter cavers during one of my practice dives, I humbly acquiesce to their greater wisdom and try to learn as much as I can from them. I've found that not everything can be found in a book or course and look upon them as a learning resource. Most cavern divers have already started to reconfigure their equipment to cave necessary equipment and wouldn't be caught in a cavern with dangling consoles and split fins.
I understand the frustration behind the remark "a little knowledge can be a bad thing" and agree with it, But one thing I learned in my cavern course, from observation, was that the course tended to split the class into two groups: those who loved it and wanted to go on to the next step and those who realized that it wasn't their cup of tea and had no desire to be in a cavern, much less, a cave environment.
Cavern divers need the opportunity to practice technique and equipment configuration. I know when I go for intro, I want to have everything squared away and not to waste class time working on buoyancy and trim issues or learning how to configure my long hose and light cannister. For me, that is probably quite a few dives away. I try to make the trip up to cave country once a month to get in a few practice dives and look forward to meeting a lot of the full cavers who post here. The last thing I would want to do is alienate myself from the cave brotherhood just when I seek to (hopefully) join it in the near future. This weekend I'm planning on going up to Little River and Madison Blue for my monthly sojourn. Hope to see y'all there.