I was thinking back trying to remember if I ever had a "bad" experience in a dealer service department and besides perhaps paying $1.50 for a $1 job, I can't say I have. Here in Boise, I use the local GMC dealer service department from time to time and they have been more than great. In fact, I can say for certain they have saved me thousands working with GM NA. In addition, they charge $25 for an oil/filter change. The only reason I don't use them for oil changes is I prefer WIX filters (Napa). I am certain other people have the polar opposite to say about them, but I am certain the crap Bill had to put up with wouldn't happen at the local GMC dealer here.
I know for a fact my anecdotes don't represent the norm (just based on credible people here), but I would just say, I don't think they ALL are bad or don't care what I think about the service. Hell, they badger me constantly to "know how they did", when I go in for something.