Yeah, I had noticed earlier that MSNBC (and other NBC channels) went from 30 fps to 60 fps and that the bit rate had increased. What I did not notice initially is that it also went from 1920x1080 (1080p30 or 1080i30, probably the former) to 1440x720 (720p60).
I went through nearly all the TVE channels and they all seem to be either 1920x1080 30 fps or 1440x720 60 fps. There were a few that were different from those resolutions, but only by a few pixels. I don't recall finding any that were 1080p60. The bit rates seemed to vary quite a bit, but it's hard to nail that down when only looking at each channel for a few seconds.
So, the change to the NBC channels is not quite as exciting as it first appeared.