I heard the residents were a little unhappy--check out
amsa's residency review (under resources on amsa.org).
Personally, I found the assistant on the phone to be really rude
both when I scheduled my interview and when I cancelled it and in between. Nothing in particular, just a really irritated tone of voice every time I called with a question or to schedule or cancel.
There's got to be something wrong if a person can't even be nice in normal interactions with strangers that you'd think they are trying to recruit. But if you'd really like to live in Denver, find out for yourself how it is. I learned not to give too much credence to gossip--there were a few times when the gossip was wrong.