Well her post has sense. Sasuke did mention that. He stated that such level of chakra perception can enable him to predict his opponent's movement. It is only bold and natural to assume that Byakugan grants the same ability. And it was confirmed earlier with the episode.
As for the level of precognition, we won't really know until we witness Byakugan in action in that aspect. I hope we get to see it soon, because why the hell would the anime state that. I'm positive there is something in store in the succeeding episodes.
Re the 2 fanbases, I might be in the weirdest place rn being a Sasuke and Hyuuga fan. but WTH?