This is a good question and I'm also not quite sure what to make of it. As no one has answered this for a while I'll give it a shot, even at the risk of being w

This is a good question and I'm also not quite sure what to make of it. As no one has answered this for a while I'll give it a shot, even at the risk of being wrong. I think that what they are saying is that linearity is part of the status quo of Opponent-Colors Theory and they reject the whole thing including the linearity. So in essence they agree with you.