I do hang around here a lot. Mostly in the comics part though sometimes in the games or the anime/manga section.
Also in their fight with Broli they didn't exactly show much super speed fighting. Broli dodged their attacks one time something I've seen Superman do against Mongul. He just beat them down as they came at him. He swatted them away like flies. Also the DBZ characters actually only have one ace in their sleeves. The blasts. Thor I'm not so sure off but Superman could easily create a vortex by moving around them at high speeds that sucks all the air out to KO them. Superman's speed even without fighting would be a big advantage.
Thor I can't really say but I do know that he's extremely strong and fights people that make the Z fighters look weak in strength and in durability. One hit and that would be really all it would take for him to win. Speed Blurs and all that don't mean much in animes though so who really knows how fast they fight. I know Kenshiro from Fist of the North Star moves faster then fighters can follow that are some of the strongest and fastest in the world but I know for a fact he isn't taking out somebody like Thor just because the speed and he is a master of his martial arts along with a few others. And in Sc-Ry-Ed it never really seems like they move that fast but Cougar breaks the sound barrier while fighting Kazuma and then Kazuma steals the speed and is also able to break the sound barrier while fighting. Again I know neither has the strength to beat Thor even if Kazuma was able to rebel against death and live for a few thousands years. Nothing any Z characters have done in the anime or movies have shown me they have what it takes to survive punches from a person of Thor's strength level nor have the strength physically to hurt anybody with his durability.