Man, I tried that today, and you get some great info. And the specualtion is also cool, even though it could easily be all false. But really, they got a ton of information about One Piece characters, The Navy and their ranks, and all this other nice info. You guys should really check it out if you haven't already.
Also, jaguar D. Sauls explanation was beautiful. Here's the link to it:
Gold roger's one is also great, and has some neat speculation: