I pre-brief using a variety of electronic sources. I still often call, and when I do I'm listening for anything that doesn't match the mental model I've already built about the flight. Occasionally, they'll say something that jumps out as disagreeing with what I've got in my head. It's a good cross-check, and also a good last-minute TFR check. Nice to have on record for CYA just in case, too.
I've noticed a change in the last six months or so, though. I typically request an Eastern Texas briefer, and I used to almost always get one without a wait. Within the last year, I've started to notice that more and more often, I get put on hold for ~5ish minutes, and when I finally get a briefer they often say something like, "Hold on, I'm not familiar with Texas so let me review this information for a sec first." Not sure what's up with that.