No. we are giving [apparently deserved] credit to those particular terrorists because they went out of their way to have good Information Security. It's an article of faith that most terrorists not only have poor security, but write things down that don't actually need to be written down.
The San Bernadino pair kept separate electronics, sterile phones and successfully destroyed coms and disk that had evidence on them prior to the attack. THAT's what makes it worth mentioning in their case.
