We are also a CMG (ApolloMD) that staffs Wellstar Kennestone Hospital. I certainly don't think our residents are ill-trained. Heck, the interns have done more CVL's and chest tubes than I did during my first two years of residency. Core faculty get protected time for lectures (including the night before) as well as protected time for residency related stuff. Not all CMG's are bad.
I think
@12jas was referring to who owns the hospital -- a certain for-profit company that owns many hospitals and has many residencies has received the reputation that the residencies have issues.