People are really obsessed with polling these days...
I'm an avid television junkie and I hadn't heard of the channel until about 10 months ago when it was added to Dish. I don't need a poll to figure out that Shorts-HD is not on the majority of subscribers "short list" for must have channels.
I'm into relatively "artsy" and cinematic programming and Shorts-HD wouldn't make my list of the top 50 channels I don't have now that I'd want in HD...
When I can't watch shows like The Killing, Mad Men, Breaking Bad, Top Gear, Doctor Who or even The Cooking channel in HD - I could really care less about watching half thought out, low budget, glorified movie trailers.
I think the "average" subscriber would agree with me.