In the roundtables afterwards, they talked up the scene and how great it was: A screaming Wondercon crowd got treated to a new Terminator Salvation trailer and two long scenes, Afterwards, at the roundtable, McG told us he saw Moon's breasts as expressing the human softness that's what we're fighting the machines for, and they're like the opposite of the hard machine world, but on the other hand maybe it's just a gratuitous juvenile scene that drags down an otherwise serious movie, and that's what he's debating with the studio right now.
Moon had no problem with it — we know, because we asked her.