I rotated with residents in 6 different residency programs (OBGYN, IM, GS, FP, PEDS, PSYCH) in NJ, NY, and CT. I can tell you that from my experience "the 80 hour rule" DOES NOT really exist, except for FP and Psych. The interns in IM and General Surgery work the hardist and put in well above 100 hours/week. I, as a student worked more than 100 hours/week since I was required to be with my intern at all times.
Yes, yes, the senior residents "will try" to "convince" you to go home by 10am on your post call day, and after sign-out on regular days, but IN REALLITY, if you leave behind unfinished work, your fellow residents and seniors will be very very very pissed.
From my experince in those 6 different residency programs, Interns in IM and GS:
1) Did not have a weekend off during the first 3 months of residency.
2) Usually leave around 8pm on regular days (sign-out is a 5pm).
3) Usually leave around 1pm on post-call days ("on paper" it is 10am).
4) Work well over 100 Hours per week ("on paper" it is 80 hours
).
5) On call q3 on avarage.