In demostrations with European guards, they hold the back of the work piece down with one hand on the back until they get to the guard, and then continue by hold the front of the work piece down with one hand.
I have always found that if I don't hold both ends down with equal pressure I get a lousy cut. Obviously that can't be done with a european guard. Are their jointers somehow superior, do they get lousy cuts, or are they just better at it then I am?