I actually kind of do the opposite when riding flats, standing upright, relaxed, knees and ankles loose, shoulders/hips closed and weight on the nose. Btw OP, good practice is to skate/ride 1 footy down the bunny hills whenever possible. Though if you are screaming flat, i.e., bombing down a run...you go low, more fore/aft centered and ride loose in the knees and sucking them up.
Oh ya, I was referring to if you point the nose of your board down a run and bomb the shit out of it. If I'm on a cat track I Stand up straight and very relaxed, usually pressing or 180s or dicking around.