Yes, DirecTV uses the Ka band for most of its HD service. I'm a DTV subscriber in Northern California, and am pleased with the reliability of the Ka band transponders during inclement weather. Their satellites at 99 and 103 degrees have a combination of Conus national channels and spot beam HD locals.
FWIW, Dish Network looked into using the Ka band for its expansion and rejected it, preferring to lease additional Ku birds all over the place.
I was a microwave engineer before retiring, and I remember the "raised eyebrows" in the early '80s when NBC decided to use Ku band for their network satellite distribution instead of the tried-and-true C band, which ABC and CBS went with.