There's some slow mo video of Stoner heading through some corner. You can see the front tire is aimed at the inside of the corner, over the curb, on corner entry. When he gets to the apex, he's slid both front & rear so his front tire is right at the apex, right on the edge of the track. Pedrosa can do it too, but isn't as clean and consistent about it.
"There isn't any secret," he said. "It's all very obvious."