First off, let's define dancing. Dancing very often has some reloads as part of its sequences. So, if you're HBSing from behind a wall, then this really doesn't apply to you. Finally, dancing is inherently a bad decision. You risk wasting lots of ammo, another play can get lucky against you, and you're very vulnerable even if you do manage to win the dance.
Movement becomes the key to winning a dance.
Yes, that's right. I know that I've heard some people explain that they like to stop for a split second and get a bead on the other player. I think that's a no-no because that really doesn't give the advantage to anyone, except maybe your opponent. So, keep yourself moving. If anything, try shuffling while you're dancing, to see if you can get a good bead on your opponent.