The Blues are still flying the F-18 A and C models. From what I've read they've rejected the move to the newer Super Hornets. The older models are more nimble, weigh less and cost the Navy less. It may also have to do with the overall state of the Navy. The way the Navy is at the moment the Angels would only have 2 choices: Move to the Super Hornet or wait for the F-35, and oh, by the way, both options would increase costs exponentially. Tough position to be in.
I'm not sure how it is for the Air Force. I thought they were using a more recent block of the F-16.
I saw both groups this year. The Thunderbirds at our local air show, and the Blues out at Mirimar. My heart goes out to the family of the Blue Angels pilot.