This question is for Sifu Phil Redmond:

I was on your website http://wingchunkwoon.com/ and noticed that the videos you have of the forms look quite different from the the way I've been taught them. In particular, there's less shifting(none, maybe?), and much more footwork/stepping movements. Is this characteristic of the William Cheung method of ving tsun? Do you guys do this to emphasize mobility?