We have had this conversation a couple times and it is always interesting.
I don't have the definitive answer, but I did do an experiment. I had 6 plants to harvest. I put them all in the dark, and harvested one a day for 6 days. Therefore, the first plant harvested had one day of darkness and the last had 6 days of darkness.
I can tell no difference but some say that they can. If there is a noticeable difference I would like to learn more about that.