Point taken that I and Impossible do not speak for the vegan movement. I think I could prove my point with a theoretical bet, however. Ask X amount of people from the overall general population to name the top 3 vegan brands, and I would take the wager that Impossible is in that top 3. Therefore they would be significantly identified with veganism at large.
Impossible might be identified with veganism at large, but the converse is not necessarily true. I think that there are just few enough vegan brands that I'm aware of that when thinking about veganism at large, brands are not really at the top of my mind.