my understanding of "cush" is:
1) fair amount of elective months
2) residents rarely go over the 80 hour rule
3) program attempts to guide residents through their training, reduce or at least talks about stress, etc.
4) perhaps teams rarely reach cap, but not having enough cases can also be bad for you
that's all i know about what people have discussed with me. you could think about free parking, free lunch, but that's more about compensation, not the "difficulty" or "workload"
Cush residency: Somewhere you go, don't work hard, read a lot, graduate, pass your boards and still end up as a lousy MD because your clinical training was too weak...
If you go on an interview and all the residents are playing Angry Birds on their iPhones during the tour of the wards, it's probably safe to say it's a cush residency.