Okay so I've decided to write. I thought my observations may be of interest.
I had Comcast installed today, two HD-DVR's, and the first thing I noticed was the reduction in HD picture quality. The reduction isn't much but it is there. I have two HD sets, one fed via 720P component and the other via 1080i HDMI. The drop in picture quality is evident in both. Comcast has no answer for this. They are willing to look into it but I doubt there is anything they can do. I still have Dish right now so I may just dump Comcast. Comcast will not charge me for the weekend if I am not happy. I want NESN-HD but at what cost.
On the plus side Comcast has alot of free HD movies available.