Not anymore. The network feeds are all satellite, and pretty much everything else going out is digital...but tape is used in the field.
LOL!!! This comes from someone who had to shoot her own FILM (yes, FILM) in her early days in TV!!!
I guess that's true for stuff ready to air. My only experience has been with studios, CBS and NBC testing of pilots and trailers. Most of that was/is sent to us via tape. Even our testing center at the MGM in Las Vegas, which is set up for satellite feeds, still uses tape more than anything for our work (mostly Spring testing for Fall pilots).