This is my point - I know all three hand forms and three non hand forms, chi sao, lok sao, feeding techniques etc but I would not consider myself to be a Master. Especially compared to the likes of Ip Chun etcBruce lee trained for 2 years and was pretty good at chi sao. Take a look at google, I think there's a few vids of him there.
I believe a master is self pro-claimed. If you claim yourself to be a master though, another master may come see if you really are.
Lemme know if I'm wrong but mastering would have to do with knowing every motion/form and having a firm knowledge and understanding of the movements. They would know all 3 forms, pole, dummy, sword, chi sao and history of WC. They can apply these movements to both demonstrations and fights. Right?
It is a shame there is no set definition of what being a Master is