I'm inclined to say no on this one.
Like the DAT, you are responsible for a huge amount of material in a short amount of time. There's a lot of it, but the material itself is not difficult. If you haven't been exposed to it before, I can see it being overwhelming. For most of us, though, we've seen all of this in undergrad.
For instance, in a given day, we have on average 5-6 hours free outside of class (if you're trying to maintain 7 hours of sleep a night). We were responsible for memorizing about 300-400 new concepts for anatomy every week, waxing, a semester's worth of molecular biology and immunology, dental morphology, all in 7 weeks.
What it comes down to is discipline. I was able to tell myself that studying for the DAT meant investing a short period of time (10 hours a day, 7 days a week, for 3-4 weeks) for a lifetime of happiness. Dental school, however, has been a discipline marathon.
You want to have a life outside of dental school, then you need to be responsible and plan accordingly. You study late every weekday and you study early every weekend. This is every day.
I've had my down days where I feel exhausted, but when I actually take a moment and reflect, it hasn't been that bad (thus far).
My school heavily emphasizes didactics, so YMMV.