Yes because they are upfront about it. You know what you ate getting --which is blatant propaganda. Everyone knows this. With NPR they have people believe they are unbiased and have no ideological framework. It's way more subversive, because for most inane things they appear unbiased so when they want you to buy into something you are predisposed to believe their delivery.

Take a good liar. Do they lie at every occasion? No, for the most part all they say is plausible and they use that believability to their advantage. Note I am not comparing NPR to liars, I'm comparing the phenomenon.