No, they've throttled streaming video to extort money from Netflix.

VoIP has been eating telcos long distance revenue lunch since Vonage came out 10 years ago. Why do you think it's "fairly logical to assume" that they're only just now getting around to to talking about what they might do about that?

Indeed, Comcast did try to throw its weight around in 2009. I'm not sure what came of if, but blocking competing VoIP evidently wasn't it.