Its not secret techniques, its more efficient ways to execute them. The proof is that the majority of schools teach techniques and leave out important details. Some schools figure these things out, some don't. Some readily share them, some don't. Ryan will show you things if you come to him, we just don't make it a point to spread it around just for the sake of talking about it on the internet and stuff.
For example, last week I was training with Bruno Frazatto. We were working on passing the RDLR guard. Tornado guard. Whatever stupid name it has. I have had at least five people teach me this same pass. Not one of them added the details Bruno added. He corrected me the very instant I was not in the perfect position, and it made all the difference for control. Off the top of my head, my foot was too far away from my sparring partner to apply appropriate pressure, and then it was too close so they could easily swing to deep half guard. My foot was turned the 90 degrees in the wrong direction, and thus my base was affected, and because my base was able to be moved, I couldnt apply appropriate pressure. My head was too high, and the pressure from my right arm was directed too low on their body. He adjusted the way my arm was turned and it made me able to hold the right side of their body flat. These are details you would not notice just by watching a match, so if you think that this stuff will just "come out" over time, you are wrong. It comes out by people studying these positions intensely and scrutinizing them.
In the next pass, the adjustment was the pant grip I was using. My knuckles needed to be facing down to appropriately control their leg, and they had been facing 90 degrees the wrong way, towards them.
To use Roger as an example, he is not doing the same thing as anyone, no matter how basic his jiu jitsu looks. Why is he able to easily do things everyone else struggles with? Why is he able to make things look so easy? Because he understands the adjustments that need to be made for success and for the body mechanics to work the correct way, and has drilled it enough that these small details have become second nature and automatic. If you think Roger is "just good" you are naive and not looking at things critically and you should go pick up a book about creationism and be content with never being able to reach a comprehensive understanding of why things work.
The problem with these kind of explanations is that many cannot grasp them without FEELING and drilling what is being talked about and thus they misinterpret them. And what's worse is they just have to justify and expand upon their misinterpretations because the internet loves to talk.