From what I've gathered, it appears as though most, if not all, reported FTA HD feeds are on C band. I'm not terribly familiar with the finer points of FTA HD reception, so can anyone verify this, or are there occasionally Ku HD feeds as well?
Yes, occasionally. NBC has 99.9% of all their feeds on ku. They have since they left c-band about 20 years ago. NHL playoffs, occasional NBA ABC games, NFL Patriots pre-season games last year, ESPN NHRA races are ones I can think of right away and ones that have been posted publically.