No. With something as important as a space launch, the idea of a 10-second abort based on a phonecall is crazy. They need to be sure it isnt disinformation. That late in the game i would expect all communications to be only from verified sources, sources on a list with dedicated pathways and roles. Millions, billions are on the line.

I have taken issue with musk tweets that have been less than accurate before. Time will tell.