I am a mid-range student here at Pacific, just aiming to pass with respectable grades. I havent pulled an all nighter, I go to bed at 11 (even during finals), and I spend a good part of the evening with my wife and son. I also dont study on Sundays.
I study from 830 pm to 10 at night and if I have a quiz or test I will get up early. Saturdays are study days. So far I have been keeping my head above water and that is what matters to me. I do take my hat off to all those out there really putting in the work to get excellent marks. It takes a special someone to study all the time, do extra-curriculars, and then pile on research.
Stress is the feeling that the obligations placed on you exceed your abilities. By that definition, dental school has not been stressful. With some organization, prioritizing (just say "no" to the TV, internet), its really not that bad.