No. The Navy reported hearing a sound consistent with an implosion to the Coast Guard on Sunday, immediately after the search began. This is a top secret system. The Navy couldn't say for sure that the sound was the imploding sub, and no vehicles capable of searching the sea floor were on site until yesterday. It was kept hush because of the uncertainty of the source of the sound. None of this was reported to the media for those very logical reasons.
The implosion sound corresponded with the vehicle's descent, the loss of communication, and the loss of navigation.
The odds of those four things happening at the same time and NOT mean the craft went kaput are PowerBall lottery-class.