It's going to be dependent on your flows, but this is an interesting question. I'm under the impression that during a flow, the bees will seek to fill any available space as quickly as possible, since they are programed to take advantage of food by gathering it when it's available. So the triggers for them to put up honey, as it were, are a nectar flow and space to put the nectar. If there is a nectar flow, but no space to put the nectar, perhaps because the combs are already full, they won't continue gathering. This is why beekeepers continually add supers to hives as long as the nectar is coming in, so the bees will put up more and more honey. I'm my opinion, it's less about when you extract, and more about making sure that the bees have enough space to store the nectar when it's available.