I think how much you lose during drying depends on many factors. On my last grow I flush my plants two weeks before I cut them down watered with just plain water one week after flushing and then a week later I cut them down. Obviously they where water starved at the end of 10 weeks having not been watered at all for the last week and only half as much water as usual the week before. Doing it this way I find that I only lose about 50-55% of my wet weight, before I started doing it this way I lost at least 65-70%. I relize I am not gaining anymore weed than if I watered it right before I picked, it is just already dry so it drys fast. My point is if I had six pounds wet doing it my way I would also expect to get about three pounds dry. Peace.