I sent them an e-mail about the same thing. My question was about the schedule on their web site not showing anything as being in HD. I got a reply from the program manager that said they were still working on their web site, that he would let the web master know that people were wanting that info. He said that there is always an HD stream and an SD stream. This implied that they are producing shows in HD but did not actually distinguish between true HD and upconverted SD. He also did not answer the specific question of whether their locally produced sports events, which are all in 16x9, are all true HD. I sent a second e-mail asking that specific question again. I haven't gotten a reply to that e-mail yet.
I did not say that I was watching through 4DTV/HDD200. He must have guessed it since no one else has access to their HD feed. He said that they are working on making ASCN available on 4DTV. I am not sure what he ment by "working on" it since it is available now.
Roy