I don't have any off hand linked on the system I'm on. Pokersoftware, rounders radio, and some other radio shows have archived discussions about leak buster, as well as articles. Keep in mind, the stat ranges are just ONE small part of leak buster. There's a lot more useful resources for players of all skill levels.
In essence though Leak Buster weighs ranges based on percentage of players that have the highest winrate for that stat block. And then it provides leak significance based on that. So a simple example is VPIP at 6-max might be a suggested range of 20-29. There are profitable players that can play say 32, but they are a smaller percentage of the population. A range of 30-32 may still be a winning range, but a smaller pool of players. If you play 31, it's not going to list this as a leak, and it will show what the average winrate for the ranges below and above the recommended ranges are. It may flag it as a warning (in this exact case, likely not... but for other stats it may do this).
The scoring algorithm is pretty complex honestly, but this is a simplified explanation of what it's doing. It's going to guide you towards how stats influence profitable play, and talk about why certain ranges are better than others. Nothing is absolute, and Leak Buster is very flexible about how it scores and understands stats and how they influence each other. After all, it's been developed by a lot of winning players, which is part of why it's been so successful. Our team knows and understand poker at a pretty high level.
I used to be a mid/high stakes player myself and have been a winning player for a long time. After losing pretty much my whole roll on black friday, I started playing some mid stakes, and again, thought I lost my whole roll. It took almost 11 months to get off the site I was on. So now, as of recently, I'm playing 50-100nl. I use leak buster on my own game simply because it helps me keep things in perspective and provides good feedback when my game goes astray. I know how to pretty well.
I can post stats all day from my past stakes that would demonstrate that. Right now though I use it in these games and it does help with my bottom line. I can show you in leak buster too if you want to see how my results match to what LB says, but I have zero critical leaks right now. The results of that are below. If you looked at all of my stat ranges, they would match right in alignment with LB down the line (almost everywhere). But for me, most of what I get out of it is that it points out more subtle leaks that I'm not completely thinking about in game (real time). Some simple things like I'm opening A4s too much in EP is a small example of something I recently adjusted.
I hope that answered your question and then some.
If you have any other questions though, don't hesitate. I love talking about LB if you can't tell. I think it's the bees knees.