I've never heard of a study or experiment that found conclusively that yield or quality is in any way affected by flushing. Have you? If so, please share.you should feed all the way to harvest. dont use straight water, you need to feed till the end. you are compermising your yeild, dont ever use just water you need to keep feeding till the end..... BAHAHA I feel like a Pot star now... lol
I realize the theory behind "starving" a plant before harvest suggests that yield and quality would be affected, but from what I can gather for myself it seems most people who experiment conclude that there is "no difference" between flushed and unflushed bud. Myself included.
And to be honest, because of how much variance there is in nature, if someone here did claim to notice a difference in yield between flushed and unflushed, I would disregard as bullshit anyhow. You'd need a LOT of plants in such a study to reach any sort of acceptable statistical group.