Well, I guess this is where lineage comes in to play. Sifu allen's teachers: Feemon Ong, Gao-dao Shang, Ark Wong, Chang Dung Sheng, etc. Ong seems to get some bad press on this forum, but all are credible sources of material and well known and respected. Do you agree with me that these are legitimate sources of Chinese martial arts?
A student should expect to learn the complete authentic material, combat applications as well as the ability to derive applications from other material on their own...just to scratch the surface.