I've heard of Monty Roberts, but I don't know anything about his training. I noticed a couple of the methods in Kelly's book didn't make much sense to me, but maybe it was just me. A few of them made sense though. Then again, I haven't read the whole book. Just bits and pieces.
I've never heard of Mary Winless. I'll have to look her up! I'm guessing she's from the UK as well? I'm from the US, so that's probably why I haven't heard of her.
I noticed that this is your first post, also! Welcome! :]
Do not go where the path may lead, go instead where there is no path and leave a trail...