Bruce knew and wrote plenty about reversion so I have to disagree with that. In fact I recall discussions with him about black up the intake and even into the carbs.
I agree that when statements are taken out of their original context, they may in part no longer be true.
When a carb is delivering a flat AFR in the power band, increases or reductions the velocity through the booster still produces the same AFR.
Of course the first part is critical for the rest to follow.