acknowledge it. The Unit was a show based on DELTA, using stories of ex operators. dale comstock is a well known guy.
but the answer as to why there was no response isn't due to being black ops or not. it's because they're QUIET PROFESSIONALS. "I am a member of my Nation's chosen soldiery, I serve quietly, not seeking recognition or accolades. My goal is to succeed in my mission - and live to succeed again."
you want to know a good example, though? when shugart and gordon arrived to durant's helicopter in the battle of mogadishu, he asked where everyone else was at. the response was, "we're it". at first he was concerned, but when he realized that he was talking to a DELTA operator, his mind was put at ease; and he was a 160th pilot himself. that's how everyone looks at DELTA. in awe. on the flip side, SEALs aren't looked at that way, even 6. yes, SEAL team 6 is great, but there is only one DELTA.
on a practical level, who would you think is better. the group who pulls from already proven warriors in a HUGE organization, or the group who pulls kids out of high school or college, in a small service who doesn't do ground ops?