I think it depends on what the goal of the Sifu is, maybe. For example in the school that I used to attend, he wanted everyone to develop their techniques to the point where what they did "always" looked like wing chun because he talked about how people will train for years in Karate or Tae Kwon Do but then, when they spar, it looks like "generic kickboxing." (His term, not mine, hence the quotes.) So he wanted everyone to be a good "Wing Chun practitioner," to get to a decent level in Chi Sao before we started doing sparring. Now I go to a new school, and I have not asked him what he does other than Chi Sao because, in his eyes, I am still a new student even though I've been studying for a long time. I want to develop a stronger Sifu-Student relationship before I jump into all these questions. (I don't know why I feel I HAVE to do it that way, but it is what it is. I feel it is more respectful to wait a bit rather than to bombard him with questions only a few months in.)