For what its worth, I was looking up something on the Chinese Wikipedia and happened to see references to "Dong Style
" with only a brief reference to its tranmission in Honk Kong.
To be precise, the vast majority of references to Taijiquan "styles," seemed to be phrased as something that could be interpreted as "Taijiquan (associated with those of the) Yang/Chen/Dong Surname." I can surmise that the Chinese is not as forceful as English in implying that there is a necessary difference between styles.
By the way, I once read that at least one of the Dong's used or uses a bow stance that was narrower than shoulder width. Can anyone comment on this?
<font face="Verdana, Arial" size="2">But after recently watching a few DVDs of Yang Style, as done by the Yang Family I have seen several differences.</font>
As I understand it, there are/were also several differences in the way Yang Zhenji, Yang Zhenduo, and Fu Zhongwen do/did the form. I don't know if the Dong's show the same degree of variation, but variation is not necessarily a big deal.