DcS can't win a hand to save his life (online or in Vegas)...and he forgot to mention his 30-hr a week part-timer on the side to cover his poker losses.
I'm sure it varies for everyone. I'd say my school is relatively stringent clinically and didactically as compared with many friends at other places (that will remain unnamed to prevent banter). We haven't had anyone fail out of our class at UNC--as yet--with 6 months to go till graduation...even DcS. No summer make-ups here because we go to school year round, so yes we do study then.
1st and 2nd year class or clinic 8-5 M-F; I studied about 1-2 hrs/night Mon-Sat on average and did fine (top 5%, 95 part I). Took Sunday off. 3rd year still 8-5, but very little evening studying. 4th year is 10-4, long lunch (like most places). Work part-time...just 4-5 hrs/week on average since start of 2nd year (though that includes being paid for some of the research I do).
Each weekend is spent chilling with 3 ladies (before you get crazy ideas, two of 'em are my daughters). Life is great, especially 4th year. Just gotta hang around school enough to get my clinic attendance credit so as to graduate.
Life as a DDS student is great, if you make it that way.