Fair enough, but all I'm saying is that if he is doing Yuen Kay San Wing Chun, assuming he is being taught properly, the way Sum Nung taught it, it would be completely possible and even expectable for him to literally do nothing but Yi Ji Kim Yeung Ma every day and be able to hold it for around two hours before he learned the next thing (which would be single centreline punches). When I learned the traditional way I did nothing but YJKYM for around 4 months. Its just how that style of wing chun is taught (if you do it the way Sum Nung did it).
Most people don't do that kind of training, that's completely understandable; it is grueling and takes some serious amount of time and dedication. I have done it and I can assure you that the difference between that and "moving with footwork, even sparring from the day one." is monumental. The quality, strength, speed and power that one achieves through that kind of training is in another universe compared learning it piecemeal from day one. You can disagree whole heartedly but unless you have done that kind of training, and know YKS wing chun, you are not really in a position to know anything about it.
What I would say to callMeHawkEye is that you should ask your sifu these questions, and if your sifu is expecting you to do a lot of stance training and not a great deal of anything else I would guess he is training your properly for YKS wing chun. Can I ask you who you are learning from and where you train?