said by dvd536:you have to wait 72 hours.
BUT...the 72 hour wait ONLY affects the
"auto-hop" feature - you can still very much freely (30-sec) skip through all the commercials immediately after it's DVR'd, so it's really NO different than any other (non-auto-hop) channel you DVR today.
No big loss & FWIW, I should be so lucky to watch shows 3 days after they originally air...that's why they make 2TB DVR's.