I don't blame Crouch for pointing out the slight differences in style - but one of the reasons Martinez isn't taking the hits Crouch took is because Martinez is faster. And Martinez actually IS putting moves on guys in the open field, but he's so fast he can do it with the shoulders instead of the feet. It's a weave instead of a juke.
It's counter-intuitve, but I'm equally impressed by how Martinez takes a sack. Instead of trying to make something out of nothing (and the mistakes that come with it) like almost every athletic freshman, Martinez goes down quick, pops up quick and takes his redemption on the next play.