I am not who you asked but I will answer from my own experiences...I have a few questions:
1. Do you always know when your plants are 2 weeks out....even with new strains? If I guessed when my plants are 2 weeks out during the past 2 years of growing I'd be wrong about 50% of the time.
2. Have you ever done a side-by-side comparison between feeding until the end and doing it the way you're doing it now?
3. What do you base your "better quality" statement on?
1. For me, I wait until I put my scope down and see the first true amber. When I see the first real amber crystal in the upper middle of the plant, I know it is coming to an end soon and I start preparing.
2. Yes, numerous times.
3. I didn't make that statement of course, but in my own experiences, experimenting a lot of different harvest prep techniques, I prefer yellowing leaves, flushed, 3 days darkness. I have done none of those many times, some of those, different combinations of those, and in the end, I have always liked the yellow/flushed/3days better than any other combination.
Those who smoke what I grow, without knowing what I did or did not do, always prefer the yellowed/flushed/3days as well when they have gotten buds from the side by sides.
I will even go so far as to say, my best friend, who is also a grower, is a much better general gardener. He keeps his plants green and lush all the way to harvest. He will tell you right now that my buds are always better than his and it drives him crazy because we both know he is a great general purpose grower. His entire backyard is one big flower bed with wooden paths through them.
I also am a firm believer in grow how you want. I love the hobby of growing more then actually smoking these days. Have fun and enjoy what you do. If it makes you happy, that is what is important over all.