I think everyone is neglecting that fact that Tabitha (coming to you from the glorious civilization that is Utobitha) is the true best DJ in the Mojave wastes. Seriously, I wish there was more of that routine... it was the Fallout equivalent of listening to crazy AM talk radio. I had to make sure I'd heard all the bits before I
Spoiler headed up to Black Mountain and shut it down.
Anyway, Wayne Newton does sound a bit lost reading some of those lines, but I highly doubt they could afford to have him do more than 1 or 2 takes on most of them, and it doesn't shock me that a Vegas singer of his age has a hard time getting the delivery right on announcements about post-nuclear news events.
Also, aside from there being an entire second radio station you can switch to, there's also some solid background music for when you get tired of that and just turn the radio off entirely. I think there's actually a fairly decent selection of music available, it's just not all in one place.