Indeed its hard to generalize across all people. But I doubt many of those you list react favorably to the early times. Either way, they are likely not the ones wishing for permanent DST, because for some of them (like the ones waking up at clock 4:30am) it means they will go to sleep when the sun is still up (at solar 7pm) instead of after sunset.
When I did shift work I loved earlier start times because it meant I had more free time during other stores' business hours to run errands/do chores/etc. Also in my store, earlier times of day were less busy with customers so I could catch up on work. Of course I can't speak for everyone, and not every store is the same (I think early AM is a coffee shop's busy time)
