I don't mean to speak for others, but I would have thought from my reading that most of the radio call related comments were speculating that the abscence of comms are indicative of a situation where the tech crew definitely haven't had time to make a call - that is, they probably agree with you that the crew were at the beginning of AVIATE NAVIGATE COMMUNICATE.
That being said, I'm speculating on speculation and I dislike speculation at the best of times. Fingers crossed for good news from the search.