After waiting until Adelphia had CBS and FOX added to the line up I finally made the transition from OTA HD to Cable HD. I live in a area with multi-path problems so the while OTA was good 95% of the time, other other 5% was maddening. I took the big honking ugly antenna off the roof today!!!
Comparing the two, I notice very little difference in HD programming, however the non-HD material does seem very slightly softer (imperceptible to the wife).
The Installer was not up on his facts and even tried to tell me their standard cables were better then my top of the line monster cables. He started to switch them out without even asking! He also did not know that they even offered CBS in HD, let alone FOX. I told him that adelphiasocal.com listed both as available and that the CSR confirmed they had both when I placed the install order. I get CBS (to his surprise) but not FOX. He did hint that the plan is to add many stations in the coming months, including ESPN.
Overall, I'm happy so far. Good picture quality, simpler to use system (no switching between cable box and HD box and TV inputs), and hopefully more consistent reception and more stations in the future.