Xander: What's with the hand wave? You see that? Does that, like, mean something?
Willow: It's code. I think it breaks down to 'choo-choo!'
Anya: It probably means to follow him. That, or wait here for him.
Willow: [whispering.] Ask him.
Xander: [yelling.] Hey, Riley? What's the [hand gesture.] all about?
Riley: It means yell real loud so the vampires who don't know we're coming will have a sporting chance.
Xander: See, now he's all mad and sarcastic.
Willow: It's because you were doing all that yelling, Mr. Stealthy-pants.
Spike: Death is on your heels, baby. And sooner or later, it's gonna catch you. And part of you wants it. Not only to stop the fear and uncertainty, but because you're just a little bit in love with it.
Answer: She has superpowers, ergo fast movement. The reason she outruns him so easily in "Touched" is that she stops trying to actually fight him and just dodges instead.
Shay