Rafa and Keenan both play an open guard in no-gi that Galvao calls "lazy." Basically when you aren't close enough for them to play spiral/reverse delariva, they just kind of suck their knees to their chest and pick a hip to stay on until you attempt a pass and then they engage. When Rafa's legs are close to his chest like that he's very strong and it's not that easy to leg his legs away from his core.
They also often train with points in mind, and Rafa is very good at sweeping when people go for his feet. At ADCC 2011 Cobrinha put him in a disgusting inside heel hook that may have blown his knee but he didn't tap (http://th07.deviantart.net/fs70/PRE/...ot-d5fp1op.jpg). if you zoom in on that pic you can see the horrible twist in the knee.
Rafa has sad before that he's made a conscious decision to never tap to joint locks. Budo Jake asked him if he's so flexible that they don't hurt and he said he is flexible but sometimes they do hurt, but that he just is never going to tap to them. The chances of Andre being able to actually secure a solid heel hook or foot lock on him, let alone finish it are pretty small.
So it's probably everything that you said. Cobrinha is really the only person I've seen go for Rafa's feet and it's usually when Rafa is also going for his feet, but they never finish each other.
They also often train with points in mind, and Rafa is very good at sweeping when people go for his feet. At ADCC 2011 Cobrinha put him in a disgusting inside heel hook that may have blown his knee but he didn't tap (http://th07.deviantart.net/fs70/PRE/...ot-d5fp1op.jpg). if you zoom in on that pic you can see the horrible twist in the knee.
Rafa has sad before that he's made a conscious decision to never tap to joint locks. Budo Jake asked him if he's so flexible that they don't hurt and he said he is flexible but sometimes they do hurt, but that he just is never going to tap to them. The chances of Andre being able to actually secure a solid heel hook or foot lock on him, let alone finish it are pretty small.
So it's probably everything that you said. Cobrinha is really the only person I've seen go for Rafa's feet and it's usually when Rafa is also going for his feet, but they never finish each other.