To be honest, I don't think many people will care either way about what Hendrik is attempting to present because very few people have really looked into the language of our art.
I agree that the specific lines he is sharing are not generic kuen kuit as we are familiar with, as they are instructions not advice lines. But they are still quite common to traditional Chinese Martial Arts, and dare I say some Taichi influence is definitely present in the opening and expressions
聚意會神平肩檔。兩手前起分陰陽
Gather the yi (intention), join with the shen (spirit), even shoulder stance.
Raise the hands in front, split into yin and yang.
左腿跘出有善惡。右跟屈勁緊反藏
Left leg steps out has good or evil. Right leg crouches power (ging) is tightly stored.
This for example is classical Taichi Hoisik from my understanding and experience. Check the similarity to this opening set
http://www.youtube.com/watch?v=wrqrWaUS3sg
Wing Chun from Ip Man does not do this. Wing Chun prior to Ip Man does not do this. So at some point did we change from stepping out with the left leg to opening the toes into kim yeung ma, or as I practise heel to toe to kim yeung ma (as in traditional southern arts)??
Still a treasure in all respects, but we shouldn't get carried away with fantasy ideals that may have had little to no influence on modern Wing Chun for very good reasons