Would it be a fair assessment of the sentinels to call them visual het for sentinel? One of Ben's posts in his sentinel threads was that he thought he should rename the currently (well, them in 2010) named supers to just sentinels and call the currently named sentinels, het sentinels?

I got a trade offer involving a sentinel, and he was short with me when I passed due to my understanding of sentinels to be visual hets. If I'm wrong, I'd like to officially know it haha.