I'm not sure, cuz I'm a real newbee, but I think what they are trying to say is that the bees don't differentiate between the sugar water and nectar. If you feed them sugar water, they will use it for what they need - to eat or to make honey. In other words they don't think, "Oh, I'll eat the sugar water and only use the nectar for honey", I think they just put it all together for whatever they are making/doing at the time.
all the best,
edit - woops - guess I should refresh my screen before replying! :) Looks like you figured it out.