qigong

someone posted on here once, that practicing kung fu w/o qigong is incomplete. From what I've read, the benefits of qigong sound great, but it makes me wonder why my sifu hasn't focused on it much at all. He's only shown us a couple things and we've only done them in class acouple times...Is it possible that he is waiting to focus on qigong till there are more advanced students in class? ( I've only been studying for 7 months but I have been there either the longest or second longest) Is it common to only introduce qiqong before a certain period of time/training has passed? Thanks for any input in advance.