Karky - I don't have the specific answers to your questions. But you read a LOT of references to "TI" (total immersion") in here. Apparently it is a way of swim training that is quite different than the standard approach. Along with your research into training for swimmers I thought you might take a read.
http://www.totalimmersion.net/free-books.html
There are 2 books referenced at this site that tout the benefits of TI training. It sounds interesting to me. Q mentioned that he has done some of this training and it apparently is working out for him. If his SPL (strokes per lap) are any indication...something sure is working. I struggle to keep my SPL under 25. He can do a lap in 11-14 strokes. Has me interested in the training.