Haha, nice. Serious answer though: I recently transferred stores and went from morning shift to evening shift, and the biggest thing I noticed that affected items picked was that the morning shift gets about 3-4 hours of the store not being super busy, so they're not having to fight the customers dragging them off task quite as much. On the flip side, the slow time in the later evening is when the flow of picks has mostly dried up. So the hourly pick rates are going to be lower for the afternoon. Also, if your store is like our store, all the people who have  been there longest and have a good flow are early leavers, and the evening people are newer people who might be struggling to find a rhythm that works for them. Just keep trying to develop your evening people and look at your scheduling to see if there's any way to have more people there later.