I was just on Krauser's blog and read this. Hopefully this isn't some sort of ploy for people to buy his product, but an interesting read nonetheless.
When the first-gen daygamers were figuring out the system, the front stop was merely a tool. It wasn't the One True Way, it wasn't The Perfect Approach. It was simply a useful party trick to stop a fast-walking girl on a crowded shopping street. We taught it in bootcamps because itís easy to explain and has wide applicability.