If you would actually like to see how *some* Japanese people practice the muscle pass you need to watch the "Busters 3" DVD by Shoot Ogawa.
There is a demo on that video of the muscle pass being performed by Hiroki Ito. Hiroki places the back of his hand flat against a small round pad on a table. Sitting next to the pad on the table is a strange device that looks like a pole vault for the muscle pass. On the front of it is a ruler (or meter stick) and there is a metal arm that is adjustable for height. The goal is perform the muscle pass over the bar, just like in pole vaulting. All I can say is the demo is amazing.
Also on the video Shoot Ogawa goes into great detail explaining various training methods for the muscle pass; such as placing the backs of both hands flat on a table and then perform the muscle pass from one hand to the other. After you can do that, stack a few decks of cards on the the table and place them between your hands and see if you make the coin jump over the height of the decks, if you can keep adding more decks. Challenge your friends and see who can do the most!
Shoot also provides lots of other methods and tips for height as well as use of the muscle pass; however this isn't a muscle pass video. Also on the video:
* Card Setting
* Coin Roll
* Thimbles
The sections on the coin roll and card setting (going from a shuffled to a known order) have demos which are also equally amazing as the muscle pass stuff.
Now the bad news, I believe you can only get this video if you attend Shoot's lecture. However there is a photo of it on Shoot's Myspace page.
http://www.myspace.com/shootogawa
Anyway, I believe the *real* secret is not worry too much about how other people train, just make a game out of training (challenge your friends) have fun and try to constantly find new and different ways to measure, test and develop skill. Your motto should be "keep going"...
Hope this helps.