I'm no expert on this, but a couple friends of mine know Kevin and they all say he's a good guy - that's good enough for me. The thing about the "KBM" is the technique for using specifically Megs 105 with a PC to get results equal or better than a rotary. Now, before you say (no way) I can name several top detailers that swear it's true.
OK, the name "Kevin Brown Method" was actually started by one of those guys and he has since gone to work for an on-line store where they have put together some kits specifically for the KBM. Is that hype? Maybe, if you didn't have all the facts. Me? I've been doing a variation of the KBM with other products with good results, but I doubt I could hang with the full timers that have the whole M105 thing down pat.