When I lived in suburban Boston, Comcast had the majority of its HD channels in the 800 range. The 200 range was for standard definition expanded basic channels.
Bright House in Daytona Beach has all of its HD channels at 1001 and above, with the standard definition channels in the triple, double, and single digits. I like this arrangement much better, but it would be convenient if the HD channels mirrored the SD lineup.
Comcast also always allowed the option to instantly switch from SD to HD with the touch of a button, but that option was only added to my Bright House cable box a couple of months ago. Before that, I had to go to the program guide and hunt.