I... only have played female Redguards, but I've heard more than one mention of how the shouts are supposed to be differently voiced for each race/gender combo.
That's what I recall also from some interview before the game was released; however, I've played a male Dunmer, Nord and Argonian and the shouts sound pretty much the same. I was hoping there would be some cool raspy Argonian version of "Fus Ro Dah," but he sounds just like my Nord.
I've noticed my followers have different grunt noises depending on their race, but I think the player grunts are the same, at least for males.