This is true IF you are talking about dropping block programming for NPR News.
The music format is the afterthought, and in the case of the stations that have done this, the music format is banished to inferior signals that don't cover much of anything to provide political cover for going all news/talk on the better signals.
Again, I ask you this: do you really believe that UW has any intention to keep 88.5 all jazz longer than 12 to 24 months if Friends doesn't get the deal done? Because the stations that drop "tent pole" programming bury the low billing music programming on translators and HD2 and put news/talk on the full market signals.
You don't waste a full market signal on a format that bills less than what it replaced.