I've never heard anyone complain about the quality of TW's HD channels. All reports indicate that TW does not compress or change the resolution of the channels but retransmit them to us as they receive them.
The analog channels are nowhere near the quality of the same channels shown digitally on Dish or DirecTV. I had D* years ago, then E*, then TW so I can honestly compare Dish to TW on the "standard" channels. If it's any consolation, TW will be starting digital simulcasting in a couple of months and from what others have said, it makes a HUGE improvement on the former analog channels.
I'm in Dayton, by the way.