Yep, but at first it was visually a lot smaller than that. "It's so far away but it still fills the screen!" When you have a featureless geometric shape hanging in space like Fesarius or a Borg cube, you have no way to tell how close or how large it really is.
Since Voyager is in the foreground in that shot, all it implies is that Voyager is smaller than the cube. The beam weapon goes off to a vanishing point. How far away is it? How relatively fast is Voyager moving toward the cube? We don't have any of that information, so this shot is useless as evidence for measurement.
I suspect Schneider reached his conclusion using more informative visuals. Whatever happened to deferring to the judgement of the more obsessed?