I think I mislead some people here. Not all the lifts are done at max speed, there is probably a 60/40 split of lifts that Doyle recommends done with a high/low speed respectively.
Devils, the method you speak of by training with lighter/heavier bats is covered in depth on beabetterhitter.com somewhere, I can't remember/don't know the link that I'm talking about though, but the site is very small and straight forward, so it shouldn't be too hard to find.
Not to hijack the thread, but I seem to be having either a hard time navigating this sites store or CFTS is no longer sold here. Is there a better book than CFTS or do I have to buy it somewhere else? Feel free to PM me if you don't feel like clogging the thread as I just did.