how much did you study then? We have 3 hours of lecture in the morning and then labs a few afternoons a week. The average lecture probably takes a good hour to go over, but the anatomy ones always take 2-3 hours. So on top of class that's studying anywhere from 3-6 hours. Honestly, it's usually closer to 4. If you keep that up during the week then your weekends are free (except for the week before tests once a month). I can't imagine being able to study much less than 3 hours/day and still honor in everything. How often did you study?
It also sounds like that at schools with traditional curriculums M1 year is not that much worse than undergrad. At my school, M1 year actually matters for boards so you start that "M2 type studying" during 1st year. For example, we covered cardiopulm, GI, renal endocrine, and urogenital all in 1st year. When we cover an organ system, we learn all the histology, anatomy, physiology, pathology, etc. all at once during that 1-2 month module before moving on. The workload really does change a lot from week to week. During the first and second week of each module, we have all the anatomy for that organ system. Each of those days does require like 6 hours of studying on top of classes. The 3rd and 4th weeks, though, lighten up and you only need to study 2-3 hours per day. Then the 5th week is usually the 12 hour study days for the test.