for those who wonder, Yang Jwing Ming never trained Tibetan crane, only fujian white crane...he does mention Lama in his books though, but always states that it is very different from fujian bai he both in origin and development...his style is the ancestral crane or zhong he (also known as trembling/shaking crane) , but what he is now teaching is a personal interpetation of it (hmm, isn't any sifu teaching a personal interpretation?? that's a good question hehehe).
For example in the YMAA curriculum, he doesn't teach the individual forms he knows, but rather forms he made by aggregating 2 or 3 traditionnal forms...
his master was Chen Gin Gsao,student of white crane legend Gin Shao Feng.
Here is for what I know...

Phoenix